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16年春《大学英语(四)》第一次作业答案

16年春《大学英语(四)》第一次作业答案
16年春《大学英语(四)》第一次作业答案

我的作业列表- 《大学英语(四)》第一次网上作业答案

你的得分: 100.0

完成日期:2016年05月21日 12点12分

说明:每道小题选项旁的标识是标准答案。

一、单项选择题。本大题共30个小题,每小题 2.5 分,共75.0分。在每小题给出的选项中,只有一项是符合题目要求的。

1.— Would you like something to drink? What about a cup of tea?

— _______

A.No, thanks.

B.No, I wouldn't.

C.Yes, I want.

D.Yes, I like.

2.—What's the matter, John?

— _______

A.I failed my French test.

B.It doesn't matter.

C.Nothing's wrong with him.

D.I don't think I can.

3.— Excuse me, could you tell me how to get to the post office?

— _______

A.You can't miss it

B.I don't know

C.No, I can't

D.Sorry, but I am a stranger here myself

4.— How about going fishing?

— ____________, I have no patience for that.

A.Excuse me

B.Sorry

C.Pardon

D.Apologize

5.— _______

— You too!

A.Merry Christmas!

B.What a beautiful day!

C.Help yourself!

D.It's very kind of you!

6.— Hi, I'm glad to see you.

— _______

A.Thank you

B.Me, too

C.My name is Mary

D.I'm glad to hear that

7.— What do you think of your new teacher?

— _______

A.He came to teach us last week.

B.He teaches us English.

C.He has two children.

D.He is very nice.

8.— Now let's move on to another topic. Can you follow me?

— _______, Professor.

A.No, I am not

B.Yes, I will

C.No, I haven't

D.Yes, perfectly

9.— You've been busy, haven't you?

— _______

A.I was busy last week.

B.Yes, I've been working hard on my paper.

C.I will get busy with my English studies.

D.I'd like to get busy like our teachers.

10.— How much is this necklace?

— _______

A.It's very nice.

B.It's a birthday present from my parents.

C.It costs fifty pounds.

D.It's a bargain.

11.—____I put my coat here?

—Sorry, you ______.

A.May; mustn't

B.Do; don't

C.Can; needn't

D.May; can't

12.He put forward a theory, _______ of great importance to the progress

of science of technology.

A.I think which is

B.which I think is

C.which is I think

D.I think it is

13.Excuse me for breaking in, _______I have some news for you.

A.so

B.and

C.but

D.yet

14._____she was invited to the hall made her very happy.

A.That

B.If

C.When

D.Because

15.It is the best ______ I have seen.

A.that

B.who

C.whom

D.which

16.The sports meeting was put off till the next week _____rain.

A.in spite of

B.so

C.because

D.because of

17.The music sounded _______. I enjoyed every minute of it.

A.well

B.boring

C.wonderfully

D.beautiful

18.He _______ lives in the house where he was born.

A.already

B.yet

C.still

D.ever

19.We came finally _________ the conclusion that she has been telling

lies all the time.

A.of

B.into

C.to

D.at

20.The atmosphere _________certain gases mixed together in definite

proportions.

https://www.docsj.com/doc/5b2486833.html,poses of

B.is made up

C.consists of

D.makes up of

21.I don't know the park, but it's______ to be quite beautiful.

A.said

B.told

C.spoken

D.talked

22.We are next-door _______.

A.neighborhoods

B.neighbor

C.neighborhood

D.neighbors

23.How ______ you say that you really understand the whole story if

you have covered only part of the article?

A.can

B.must

C.need

D.may

24.He didn't pass the final examination. He _______ it.

A.must have prepared for

B.ought to prepare for

C.ought to have prepared for

D.should prepare for

25.Peter worked so fast with the maths problems ______ a lot of

mistakes.

A.as to make

B.that made

C.to make

D.that he made

26.Down the entrance hall of the school walk four eighth-grade students.

Each one is carrying a small basket with a single egg inside. Soon

more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket are part of a new school program that helps young people understand that having a baby is a great duty.

At the beginning of the program, the teacher puts the students in pairs-one girl and one boy. Each pair gets an egg, which they must take care of for two weeks. For those fourteen days, the students have to take care of the eggs as though they were real babies.

Students whose eggs get broken have to start the two weeks all over again with a new egg.

One person in each pair must have the egg with him or her at all times-twenty-four hours a day. At no time can they let the egg be out of sight. "If a teacher catches you without your egg," said one student, "she makes you go get it. They are really strict." The teachers also make the students spend half an hour each day sitting with the egg and just watching it. That can get pretty boring. But it's also something that parents spend a lot of time doing.

Children say that the program has helped them understand the duties involved in having a child. "It was really hard," said one student, "You had to think all the time about the egg." (1)、The purpose of the program is to help students grasp the idea of ______.

A.carrying a basket with an egg

B.bringing up a baby

https://www.docsj.com/doc/5b2486833.html,ying eggs

D.studying hard at school

27.Down the entrance hall of the school walk four eighth-grade students.

Each one is carrying a small basket with a single egg inside. Soon more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket are part of a new school program that helps young people understand that having a baby is a great duty.

At the beginning of the program, the teacher puts the students in pairs-one girl and one boy. Each pair gets an egg, which they must take care of for two weeks. For those fourteen days, the students have to take care of the eggs as though they were real babies.

Students whose eggs get broken have to start the two weeks all over again with a new egg.

One person in each pair must have the egg with him or her at all times-twenty-four hours a day. At no time can they let the egg be out of sight. "If a teacher catches you without your egg," said one student, "she makes you go get it. They are really strict." The

teachers also make the students spend half an hour each day sitting with the egg and just watching it. That can get pretty boring. But it's also something that parents spend a lot of time doing.

Children say that the program has helped them understand the duties involved in having a child. "It was really hard," said one student, "You had to think all the time about the egg."

(2)、At the beginning, ______.

A.only one student joined the program

B.four students in all were interested in the program

C.eight students became members of the program

D.more students than teachers liked the program

28.Down the entrance hall of the school walk four eighth-grade students.

Each one is carrying a small basket with a single egg inside. Soon more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket are part of a new school program that helps young people understand that having a baby is a great duty.

At the beginning of the program, the teacher puts the students in pairs-one girl and one boy. Each pair gets an egg, which they must take care of for two weeks. For those fourteen days, the students have to take care of the eggs as though they were real babies.

Students whose eggs get broken have to start the two weeks all over again with a new egg.

One person in each pair must have the egg with him or her at all times-twenty-four hours a day. At no time can they let the egg be out of sight. "If a teacher catches you without your egg," said one student, "she makes you go get it. They are really strict." The teachers also make the students spend half an hour each day sitting with the egg and just watching it. That can get pretty boring. But it's also something that parents spend a lot of time doing.

Children say that the program has helped them understand the duties involved in having a child. "It was really hard," said one student, "You had to think all the time about the egg." (3)、In the third line of Paragraph 2, "they" refers to ______.

A.teachers

B.students

C.eggs

D.programs

29.Down the entrance hall of the school walk four eighth-grade students.

Each one is carrying a small basket with a single egg inside. Soon more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket are part of a new school program that helps young people understand that having a baby is a great duty.

At the beginning of the program, the teacher puts the students in pairs-one girl and one boy. Each pair gets an egg, which they must take care of for two weeks. For those fourteen days, the students have to take care of the eggs as though they were real babies.

Students whose eggs get broken have to start the two weeks all over again with a new egg.

One person in each pair must have the egg with him or her at all times-twenty-four hours a day. At no time can they let the egg be out of sight. "If a teacher catches you without your egg," said one student, "she makes you go get it. They are really strict." The teachers also make the students spend half an hour each day sitting with the egg and just watching it. That can get pretty boring. But it's also something that parents spend a lot of time doing.

Children say that the program has helped them understand the duties involved in having a child. "It was really hard," said one student, "You had to think all the time about the egg."

(4)、Why should the students in the program spend half an hour each

day sitting with an egg and just watching it?

A.Because it is very boring to have the egg with them at all

times.

B.Because the teachers in this program are very strict.

C.Because only in this way can students understand parents in

taking care of children.

D.Because if students do not do it, they will fail in the

examination.

30.Down the entrance hall of the school walk four eighth-grade students.

Each one is carrying a small basket with a single egg inside. Soon more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket are part of a new school program that helps young people understand that having a baby is a great duty.

At the beginning of the program, the teacher puts the students in pairs-one girl and one boy. Each pair gets an egg, which they must take care of for two weeks. For those fourteen days, the students have to take care of the eggs as though they were real babies.

Students whose eggs get broken have to start the two weeks all over again with a new egg.

One person in each pair must have the egg with him or her at all times-twenty-four hours a day. At no time can they let the egg be out of sight. "If a teacher catches you without your egg," said one student, "she makes you go get it. They are really strict." The

teachers also make the students spend half an hour each day sitting with the egg and just watching it. That can get pretty boring. But it's also something that parents spend a lot of time doing.

Children say that the program has helped them understand the duties involved in having a child. "It was really hard," said one student, "You had to think all the time about the egg."

(5)、From the last paragraph, we can infer that ______.

A. a program is the only way to educate children

B.one has to think about a program all the time

C.only one child grasps the purpose of the program

D.the program is of help to children's understanding of parents

三、判断题。本大题共10个小题,每小题 2.5 分,共25.0分。

1.

All over the world people enjoy sports. Sports help to keep people healthy, happy and help them to live longer.

Sports change with the season. People play different games in winter and summer.

Games and sports often grow out of people's work and everyday

activities. The Arabs use horses or camels in much of their everyday life; they use them in their sports, too.

Some sports are so interesting that people everywhere go in for them.

Football, for example, has spread around the world. Swimming is

popular in all countries near the sea or in those with many rivers.

Some sports or games go back to thousands of years ago, like running or jumping. Chinese boxing, for example, has a very long history.

But basketball and volleyball are rather new. Neither one is a

hundred years old yet. People are inventing new sports or games all the time.

People from different countries may not be able to understand each other, but after a game they often become good friends. Sports help to train a person's character. One learns to fight hard but fight fair, to win without pride and to lose with grace.

(1)、According to this passage we know that people began to play

about one hundred years ago.

2.

All over the world people enjoy sports. Sports help to keep people healthy, happy and help them to live longer.

Sports change with the season. People play different games in winter and summer.

Games and sports often grow out of people's work and everyday activities. The Arabs use horses or camels in much of their everyday life; they use them in their sports, too.

Some sports are so interesting that people everywhere go in for them.

Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers.

Some sports or games go back to thousands of years ago, like running or jumping. Chinese boxing, for example, has a very long history.

But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time.

People from different countries may not be able to understand each other, but after a game they often become good friends. Sports help to train a person's character. One learns to fight hard but fight fair, to win without pride and to lose with grace.

(2)、The writer didn't tell us in this passage that basketball was

invented in America.

3.

All over the world people enjoy sports. Sports help to keep people healthy, happy and help them to live longer.

Sports change with the season. People play different games in winter and summer.

Games and sports often grow out of people's work and everyday activities. The Arabs use horses or camels in much of their everyday life; they use them in their sports, too.

Some sports are so interesting that people everywhere go in for them.

Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers.

Some sports or games go back to thousands of years ago, like running or jumping. Chinese boxing, for example, has a very long history.

But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time.

People from different countries may not be able to understand each

other, but after a game they often become good friends. Sports help to train a person's character. One learns to fight hard but fight fair, to win without pride and to lose with grace.

(3)、People all over the world enjoy sports because sports are

interesting.

4.

All over the world people enjoy sports. Sports help to keep people healthy, happy and help them to live longer.

Sports change with the season. People play different games in winter and summer.

Games and sports often grow out of people's work and everyday activities. The Arabs use horses or camels in much of their everyday life; they use them in their sports, too.

Some sports are so interesting that people everywhere go in for them.

Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers.

Some sports or games go back to thousands of years ago, like running or jumping. Chinese boxing, for example, has a very long history.

But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time.

People from different countries may not be able to understand each other, but after a game they often become good friends. Sports help to train a person's character. One learns to fight hard but fight fair, to win without pride and to lose with grace.

(4)、From this passage we can see that according to the author sports

and games are significant to our life in many respects.

5.

All over the world people enjoy sports. Sports help to keep people healthy, happy and help them to live longer.

Sports change with the season. People play different games in winter and summer.

Games and sports often grow out of people's work and everyday activities. The Arabs use horses or camels in much of their everyday life; they use them in their sports, too.

Some sports are so interesting that people everywhere go in for them.

Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers.

Some sports or games go back to thousands of years ago, like running or jumping. Chinese boxing, for example, has a very long history.

But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time.

People from different countries may not be able to understand each other, but after a game they often become good friends. Sports help to train a person's character. One learns to fight hard but fight fair, to win without pride and to lose with grace.

(5)、The writer's attitude towards sports is positive.

6.

Albert Einstein had a great effect on science and history, greater than what only a few other men have achieved. An American university president once commented that Einstein had created a new outlook,

a new view of the universe. It may be some time before the average

mind understands fully the identity of time and space and so on-but even ordinary men understand now that the universe is something larger than ever thought before.

By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited

opportunities for study, but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply, and he sat unhappily in his office doing little.

He lost interest in his research. Only when peace came in 1918 was he able to get back to work.

In the years following World War I honors were increasingly heaped on him. He became the head of the Kaiser Whihem Institute of

Theoretical Physics. In 1921 he won the Noble Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew. (1)、The main idea of Paragraph 1 is the change in human thought produced by Einstein.

7.

Albert Einstein had a great effect on science and history, greater than what only a few other men have achieved. An American university president once commented that Einstein had created a new outlook,

a new view of the universe. It may be some time before the average

mind understands fully the identity of time and space and so on-but even ordinary men understand now that the universe is something larger than ever thought before.

By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited

opportunities for study, but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply, and he sat unhappily in his office doing little.

He lost interest in his research. Only when peace came in 1918 was he able to get back to work.

In the years following World War I honors were increasingly heaped on him. He became the head of the Kaiser Whihem Institute of

Theoretical Physics. In 1921 he won the Noble Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.

(2)、According to the American university president, The theory of

relativity can be quickly learned by everyone.

8.

Albert Einstein had a great effect on science and history, greater than what only a few other men have achieved. An American university president once commented that Einstein had created a new outlook,

a new view of the universe. It may be some time before the average

mind understands fully the identity of time and space and so on-but even ordinary men understand now that the universe is something larger than ever thought before.

By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited

opportunities for study, but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply, and he sat unhappily in his office doing little.

He lost interest in his research. Only when peace came in 1918 was he able to get back to work.

In the years following World War I honors were increasingly heaped on him. He became the head of the Kaiser Whihem Institute of

Theoretical Physics. In 1921 he won the Noble Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.

(3)、According to Paragraph 2, Albert Einstein headed a research

institute.

9.

Albert Einstein had a great effect on science and history, greater than what only a few other men have achieved. An American university president once commented that Einstein had created a new outlook,

a new view of the universe. It may be some time before the average

mind understands fully the identity of time and space and so on-but

even ordinary men understand now that the universe is something larger than ever thought before.

By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited

opportunities for study, but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply, and he sat unhappily in his office doing little.

He lost interest in his research. Only when peace came in 1918 was he able to get back to work.

In the years following World War I honors were increasingly heaped on him. He became the head of the Kaiser Whihem Institute of

Theoretical Physics. In 1921 he won the Noble Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.

(4)、According to the passage Einstein did his greatest work when

he was young.

10.

Albert Einstein had a great effect on science and history, greater than what only a few other men have achieved. An American university president once commented that Einstein had created a new outlook,

a new view of the universe. It may be some time before the average

mind understands fully the identity of time and space and so on-but even ordinary men understand now that the universe is something larger than ever thought before.

By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited

opportunities for study, but soon his peace and quiet were broken by the First World War.Einstein hated violence. The misery of war affected him deeply, and he sat unhappily in his office doing little.

He lost interest in his research. Only when peace came in 1918 was he able to get back to work.

In the years following World War I honors were increasingly heaped on him. He became the head of the Kaiser Whihem Institute of

Theoretical Physics. In 1921 he won the Noble Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.

(5)、It may be concluded that Albert Einstein was forced to serve

in the German army.

2013管理会计基础第一次-在线作业答案

2013管理会计基础第一次-在线作业答案

您的本次作业分数为:91分32576 32576 1.已知某企业生产甲、乙两种产品,其单位贡献边际率分别为15%和20%,销售比重分别为40%和60%,则用加权平均法计算综合贡献边际率为()。 A 15% B 17.5% C 18% D 20% 正确答案:C 32586单选题32586 2.下列项目中,不属于现金流出项目的是()。 A 折旧费 B 经营成本 C 各项税款 D 建设投资 正确答案:A 32554单选题32554 3.在短期经营决策中,企业不接受特殊价格追加订货的原因是买方出价低于()。 A 正常价格

B 单位产品成本 C 单位变动成本 D 单位固定成本 正确答案:C 32556单选题32556 4.()处于现代管理会计的核心地位。 A 责任会计 B 规划控制会计 C 预测决策会计 D 标准成本制度 正确答案:C 32594单选题32594 5.某企业只生产一种产品,月计划销售600件,单位变动成本6元,月固定成本1000元,欲实现利润1640元,则单价应为()元。 A 16.40 B 14.60 C 10.60 D 10.40 正确答案:D 32580单选题32580 6.某投资方案的年营业收入为100万元,年营业

D 两者相互制约、相互补充 正确答案:B 32563单选题32563 9.从投资对象上看,管理会计中的长期投资决策是指()。 A 项目投资决策 B 证券投资决策 C 其他投资决策 D 单一目标决策 正确答案:A 32610单选题32610 10.普通年金是指()。 A 后付年金 B 先付年金 C 永续年金 D 递延年金 正确答案:A 32603单选题32603 11.()是现代管理会计形成的关键标志之一。 A 责任会计 B 规划控制会计

计量经济学习题及答案

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A、岩浆侵入地壳某深处冷凝而成的岩石; B、岩浆沿地表裂缝上升到距离地表较浅处冷凝而成的岩石; C、岩浆沿地表裂缝上升喷出地表冷凝而成的岩石; D、岩浆沿地表裂缝侵入到地表某部位冷凝而成的岩石。 6、下列不属于岩浆岩的结构类型有()。 A、显晶质结构 B、班状结构 C、碎屑结构 D、玻璃结构 7、下列哪一个属于沉积岩的构造()。 A、片麻状构造 B、流纹状构造 C、层理构造D板状构造 8、下列哪种岩石属于沉积岩中的化学岩和生物化学岩类()。 A、大理岩 B、石灰岩 C、花岗岩 D、石英岩 三、名词解释(每个3分,共30分) 1、工程地质学—— 2、断口—— 3、变质作用—— 4、岩石—— 5、矿物—— 6、沉积岩—— 7、变质岩—— 8、岩浆岩—— 9、层理—— 10、层面—— 四、问答题(共24分) 1、什么是建设场地的工程地质条件?具体包括哪些内容?(8分) 答案:工程地质条件即为工程活动的地质环境,可理解为工程建筑物所在地区地质环境各项因素的综合。一般认为它包括岩土(岩石和土)的类型及其工程性质、地质构造、地形地貌、水文地质条件、地表地质作用和天然建筑材料等。 2、什么是建设场地的工程地质问题?土木工程中工程地质问题主要包括哪些内容? (6分)

第一次作业参考答案

第一次作业参考答案 1、、电能生产的主要特点有哪些? 答:电能生产的主要特点可以归纳为以下三点。①电能生产的连续性特点;由于电能不能大量储存,电能的生产、输送和消费是同时完成的。②电能生产瞬时性的特点;这是因为电能的传输速度非常快(接近光速),电力系统中任何一点发生故障都马上影响到整个电力系统。③电能生产重要性的特点;电能清洁卫生、易于转换、便于实现自动控制,因此国民经济各部门绝大多数以电能作为能源,而电能又不能储存,所以电能供应的中断或减少将对国名经济产生重大影响。 2、对电力系统运行的基本要求是什么? 答:对电力系统运行的基本要求有:①保证对用户的供电可靠性;②电能质量要好;③电力系统运行经济性要好;④对环境的不良影响要小。 3、电力系统中负荷的分类(I、II、III类负荷)是根据什么原则进行的?各类负荷对供电可靠性的要求是什么? 答:电力系统中负荷的分类是根据用户的重要程度和供电中断或减少对用户所造成的危害的大小来划分的,凡供电中断将导致设备损坏、人员伤亡、产品报废、社会秩序还乱、政治影响大的用户的用电设备称为I类负荷;凡供电中断或减少将导致产品产量下降、人民生活受到影响的用户的用电设备称为II类负荷;I类、II类负荷以外的负荷称为III类负荷。 I类负荷对供电可靠性的要求是任何情况下不得中断供电; II类负荷对供电可靠性的要求是尽可能不中断供电; III类负荷可以停电。 4、标出下图所示电力系统中发电机、变压器的额定电压。(图中已标出线路的额定电压)

答:上述电力系统中发电机、变压器的额定电压如下: G :10.5KV ;T1:10.5/242KV ;T2:220/121/38.5KV ;T3:35/6.3KV 5、为什么110KV 及以上的架空输电线路需要全线架设避雷线而35KV 及以下架空输电线路不需全线架设避雷线? 答:因为110KV 及以上系统采用中性点直接接地的中性点运行方式,这种运行方式的优点是:正常运行情况下各相对地电压为相电压,系统发生单相接地短路故障时,非故障相对地电压仍为相电压,电气设备和输电线路的对地绝缘只要按承受相电压考虑,从而降低电气设备和输电线路的绝缘费用,提高电力系统运行的经济性;缺点是发生单相接地短路时需要切除故障线路,供电可靠性差。考虑到输电线路的单相接地绝大部分是由于雷击输电线路引起,全线路架设避雷线,就是为了减少雷击输电线路造成单相接地短路故障的机会,提高220KV 电力系统的供电可靠性。 35KV 及以下系统采用中性点不接地或经消弧线圈接地的中性点运行方式,即使雷击输电 线路造成单相接地时,电力系统也可以继续运行,供电可靠性高,所以无需全线架设避雷线。 6、在下图所示的电力系统中已知KV U 3/10=φ,A U C 3530=φω,如要把单相接地时流过接地点的电流补偿到20A ,请计算所需消弧线圈的电感系数。 解: 单相接地故障时的相量图如下:

第一次作业答案

第一次作业答案

1、一项调查表明,消费者每月在网上购物的平均花费是200元,他们选择在网上购物的主要原因是“价格便宜”。 (1)这一研究的总体是什么? (2)“消费者在网上购物的原因”是分类变量、顺序变量还是数值型变量?研究者所 关心的参数是什么? (3)“消费者每月在网上购物的平均花费是200元”是参数还是统计量? (4)研究者所使用的主要是描述统计方法还是推断统计方法? 答:(1)总体是“所有网上购物的消费者”; (2)分类变量;所有网上购物的消费者的月平均花费和网上购物的主要原因; (3)统计量; (4)推断统计方法。 3、案例:分析运动员发挥的稳定性

(1)用箱线图 Excel: Spss:

(2)Excel: 亚历山大(乌 克兰)拉尔夫(德国) 克里斯蒂安(德 国) 平均10.01 平 均 10.025 平均10.015 标准0.11874 3 标 准 0.12954 9 标准 误差 0.16129

误差误差 中 位数10.15 中 位 数 10.15 中位 数 10.2 众数10.3 众 数 10.3 众数9.9 标准差0.53103 7 标 准 差 0.57936 标准 差 0.721311 方差0.282 方 差 0.33565 8 方差0.520289 峰度3.71162 9 峰 度 1.99695 7 峰度 2.721327 偏度-1.6599 6 偏 度 -1.0139 1 偏度-1.52925 区域2.4 区 域 2.5 区域 2.9 最 小值8.4 最 小 值 8.4 最小 值 7.9 最10.8 最10.9 最大10.8

计量经济学习题及参考答案解析详细版

计量经济学(第四版)习题参考答案 潘省初

第一章 绪论 试列出计量经济分析的主要步骤。 一般说来,计量经济分析按照以下步骤进行: (1)陈述理论(或假说) (2)建立计量经济模型 (3)收集数据 (4)估计参数 (5)假设检验 (6)预测和政策分析 计量经济模型中为何要包括扰动项? 为了使模型更现实,我们有必要在模型中引进扰动项u 来代表所有影响因变量的其它因素,这些因素包括相对而言不重要因而未被引入模型的变量,以及纯粹的随机因素。 什么是时间序列和横截面数据? 试举例说明二者的区别。 时间序列数据是按时间周期(即按固定的时间间隔)收集的数据,如年度或季度的国民生产总值、就业、货币供给、财政赤字或某人一生中每年的收入都是时间序列的例子。 横截面数据是在同一时点收集的不同个体(如个人、公司、国家等)的数据。如人口普查数据、世界各国2000年国民生产总值、全班学生计量经济学成绩等都是横截面数据的例子。 估计量和估计值有何区别? 估计量是指一个公式或方法,它告诉人们怎样用手中样本所提供的信息去估计总体参数。在一项应用中,依据估计量算出的一个具体的数值,称为估计值。如Y 就是一个估计量,1 n i i Y Y n == ∑。现有一样本,共4个数,100,104,96,130,则 根据这个样本的数据运用均值估计量得出的均值估计值为 5.1074 130 96104100=+++。 第二章 计量经济分析的统计学基础 略,参考教材。

请用例中的数据求北京男生平均身高的99%置信区间 N S S x = = 4 5= 用 =,N-1=15个自由度查表得005.0t =,故99%置信限为 x S t X 005.0± =174±×=174± 也就是说,根据样本,我们有99%的把握说,北京男高中生的平均身高在至厘米之间。 25个雇员的随机样本的平均周薪为130元,试问此样本是否取自一个均值为120元、标准差为10元的正态总体? 原假设 120:0=μH 备择假设 120:1≠μH 检验统计量 () 10/2510/25 X X μσ-Z == == 查表96.1025.0=Z 因为Z= 5 >96.1025.0=Z ,故拒绝原假设, 即 此样本不是取自一个均值为120元、标准差为10元的正态总体。 某月对零售商店的调查结果表明,市郊食品店的月平均销售额为2500元,在下一个月份中,取出16个这种食品店的一个样本,其月平均销售额为2600元,销售额的标准差为480元。试问能否得出结论,从上次调查以来,平均月销售额已经发生了变化? 原假设 : 2500:0=μH 备择假设 : 2500:1≠μH ()100/1200.83?480/16 X X t μσ-= === 查表得 131.2)116(025.0=-t 因为t = < 131.2=c t , 故接受原假 设,即从上次调查以来,平均月销售额没有发生变化。

运营第一次作业答案

一、简答题 1、运营系统有哪些特征? 服务业占GDP比重增大,制造业与服务业两者日益融合,运营管理系统逐渐从制造业扩展到服务业中。 质量定义扩展,如何从有形产品质量与服务质量两方面更加全面的满足客户的需求越来越成为当今管理者面临的主要挑战之一。 运营管理理念向其他职能领域扩展,广泛应用于运营职能部门的运营管理工具和理念同样也可以应用于其他职能部门,例如质量管理和过程分析。 2、社会组织的三项基本职能是什么?他们之间的关系如何? 其基本职能是生产运作,理财,营销 联系:三项基本职能是相互依存的,三项基本职能连同组织的其他只能都是组织不可缺少的,且每项职能都依赖于其他职能。 3、分别对制造业与服务业中的大量大批生产与单件小批生产各举一例,并说明其特点。 制造业中的大批量生产:电脑组件生产。 制造业中的单件小批生产:大桥建设 服务业中的大批量生产:铁路运输 服务业中的单件小批生产:理发 大批量生产特点:大批量生产基于产品或零件的互换性,标准化和系列化的应用,刚性生产线大大提高了生产效率,降低了生产成本,其显著的特点是产品结构稳定、自动化程度高。但是缺点也相当明显,但是产品单一,缺乏多样性,生产线的初始投入大,建设周期长,柔性差,无法适应变化愈来愈快的市场需求和激烈的竞争。 单件小批生产特点:产品制造周期长,订货期长;通用化设备,用人多,生产效率低,劳动生产率低;成本高;产品质量不易保证。 4、制造业与服务业在产品特性、储存性、与顾客的接触性、响应顾客的时间、 5、组织的基本职能有哪些?相互间的关系如何? 组织的职能主要有组织结构的设计、适度的分权与授权、组织内部人员的选择和配备、组织文化的培育和建设、组织运作和组织变革、组织与外部环境的关系等方面。 6、举例说明5个服务业及其特性 研究项目,博士生,保健,美容美发,快餐服务

第一次 作业答案

第二章财务管理的基础知识 一、计算题 1.某企业年初投资100万元生产一种新产品,预计每年年末可得净收益10万元,投资年限为10年,年利率为5%。【要求】 (1)计算该投资项目年收益的现值和终值。 (2)计算年初投资额的终值。 解:(1)年收益现值 P= 10×(P/A,5%,10) = 10×7.7217 = 77.217 (万元) 年收益终值 F= 10×(F/A,5%,10) =10×12.578 =125.78(万元) (2)年初投资额终值 F=100×(F/P,5%,10) =100×1.6289 =162.89(万元)

2.某人准备5年后支付一笔10 000元的款项,年利率为5%。【要求】计算此人现在应存入银行多少钱,5年的复利利息为多少元。 解:复利现值 P=10000×(P/F,5%,5) =10000×0.7835 =7835(元) 复利利息 I=F-P =10000-7835 =2165(元) 3.某企业2003年年初投资一个项目,预计从2006年起至2010年每年年末可获得净收益20万元,年利率为5%。 【要求】计算该投资项目年净收益的终值和现值。 解:年净收益的终值 F=20×(F/A,5%,5) =20×5.5256 =110.512(万元)

年收益的现值 P=20×[(P/A,i,m+n)﹣(P/A,i,m) =20×[(P/A,5%,8)﹣(P/A,5%,3) =20×(6.4632﹣2.7232) =74.796(万元) 4.某企业投资一个项目,每年年初投入10万元,连续投资3年,年利率为5%。 【要求】 (1)计算该项目3年后的投资总额 (2)若3年的投资额于年初一次性投入,投资总额是多少? 解:(1)预付年金终值 F=10×(F/A,5%,3)×(1+5%) =10×3.1525×1.05 =33.10(万元) (2)预付年金现值 P=10×(P/A,5%,3)×(1+5%) =10×2.7232×1.05 =28.59(万元)

财务管理第1次作业答案

1.投资于国库券时可不必考虑的风险是( )。 A 违约风险 B 利率风险 C 购买力风险 D 再投资风险 正确答案:A 2.普通年金也称为()。 A 后付年金 B 先付年金 C 递延年金 D 永续年金 正确答案:A 3.将100元存入银行,利息率为10%,计算5年后的终值应用()来计算。 A 复利现值系数 B 复利终值系数 C 年均现值系数 D 年均终值系数 正确答案:B 4.每年年底存款100元,求第5年末的价值,可用()来计算。 A 复利现值系数 B 复利终值系数 C 年金现值系数 D 年金终值系数 正确答案:D

5.下列财务比率反映企业短期偿债能力的有()。 A 现金流量比率 B 股东权益报酬率 C 流动资产周转率 D 产权比率 正确答案:A 6.权益乘数是指()。 A 1/(1-产权比率) B 1/(1-资产负债率) C 产权比率/(1-产权比率) D 资产负债率/(1-资产负债率) 正确答案:B 7.下列能反映公司资产管理效率(即营运能力)的财务比率是()。 A 流动比率 B 速动比率 C 存货周转率 D 流动资产报酬率 正确答案:C 8.下列关于企业投资的意义的叙述中不正确的是()。 A 企业投资是实现财务管理目标的基本前提 B 企业投资是发展生产的必要手段 C 企业投资有利于提高职工的生活水平 D 企业投资是降低风险的重要方法 正确答案:C

9.下列属于企业流动资产的是()。 A 厂房 B 机器设备 C 应收账款 D 无形资产 正确答案:C 10.某投资方案,当贴现率为10%时,其净现值为20元;当贴现率为11%时,其净现值为-20元。该方案的内含报酬率为()。 A 10.4% B 10.5% C 10.6% D 10.7% 正确答案:B 11.下列企业投资环境中属于企业投资的相关环境的是()。 A 经济形势 B 国家政策 C 产品市场 D 风俗习惯 正确答案:C 12.某企业准备新建一条生产线,预计各项支出如下:投资前费用2000元,设备购置费用8000元,设备安装费用1000元,建筑工程费用6000元,投产时需垫支营运资金3000元,不可预见费按总支出的5%计算,则该生产线的投资总额为()。 A 20000元 B 21000元 C 17000元 D 17850元

电大在线作业-证据学第一次作业答案[1].

证据学第一次作业 1、下列表述中正确的是(。B.不是所有的证据材料都具有证据力 2、关于证据学的研究对象,下列说法中正确的是(。C.人类的文化传统背景是证据学的研究对象 3、我国证据制度的基本原则是(。A.客观真实 4、民事诉讼法第七十条规定“证人确有困难不能出庭的,经人民法院许可,可以提交书面证言”,是指(的例外。A.直接言词原则 5、刑事诉讼法第47条中明确规定,“证人证言必须在法庭上经过公诉人、被害人和被告人、辩护人双方讯问、质证,听取各方证人的证言并且经过查实以后,才能作为定案的根据”。这一原则体现了(。A.直接言词原则 6、直接言词原则,是指对于证据的调查必须由裁判者直接进行,而且采用的方式必须是(。A.口头 7、凡是未经查证属实的物证、书证、证人证言等各种证据形式,统统称为(。 A.证据材料 8、证据在法律上可以作为定案根据的资格和条件称为(。B.证据力 9、新中国的证据法律制度被称为(。C.客观真实的证据制度 10、自由心证证据制度最早产生于(。D.法国 11、最早规定自由心证原则的刑事诉讼法典是(。B.法国刑诉法典 12、法律事先对证据的形式、范围和证明力作明确规定,法官只依照法律规定作出机械判断的证据制度(。B.法定证据制度

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