综上可知，a 的取值范围为(0,1]∪[4，＋∞) 12分
19、解：（Ⅰ） []2(2)5=45=21f
f f -=
--（） （3分）
(Ⅱ）2
2
2
4
2
(1)4(1)23f a a a a +=-+=--+ （6分） (Ⅲ）①当40x -≤
<时，
∵()12f x x =- ∴1()9f x <≤
②当0x =时，(0)2f = ③当03x <
<时，∵2()4f x x =-
∴ 5()4f x -<<
故当43x -≤
<时，函数()f x 的值域是(]5,9-
20、解：（1）由题意可设，每天多卖出的件数为2
()k x x +，∴2
36(33)k =+，∴3k =
又每件商品的利润为)920(x --元，每天卖出的商品件数为)(3692
x x ++
∴该商品一天的销售利润为)110(75936303)](369)[11()(23
2
≤≤+-+-=++-=x x x x x x x x f
（2）由)6)(23(336609)(2
'
---=-+-=x x x x x f 令'()0f x =可得2
3
x =或6=x
当x 变化时，'()f x 、()f x 的变化情况如下表：
∴当商品售价为14元时，一天销售利润最大，最大值为975元
21、
()()min
3
12
g x g ==……………9分
由题意得到
3
224132210
a a a ?+
?
?-<
?+>??
，
……………11分
……………12分
22、（14分）已知函数()ln 1a
f x x x
=
+-（a 是常数）. （Ⅰ）若2x =是函数()f x 的极值点，求曲线()y f x =在点()1,(1)f 处的切线方程； （Ⅱ）当1a =时,方程()f x m =在∈x 21,e e ??
????
上有两解，求实数m 的取值范围；
（Ⅲ）求证: 1
ln 1n n n
>-1(>n ，且)*N n ∈． 解：（Ⅰ） 2
()x a f x x
-'=．0)2('=f ，得2=a ，1)1(=f ，1)1('
-=f
切线方程为02=-+y x ． ………….4分
（Ⅱ）当1=a 时，21
1()lg 1,()x f x x f x x
x -'=
+-=
，其中21,x e e ??
∈????
， 当??
?
???∈1,1e x 时，0)(<'x f ；(2
1,x e ?∈?时，0)(>'x f ，
∴1=x 是)(x f 在21,e e ??
????
上唯一的极小值点，∴ []0)1()(min ==f x f
2222111()2,()lg 11,f e f e e e e e =-=+-=+2211()210f f e e e e ??
-=---< ???
综上，所求实数m 的取值范围为{|02}m m e <≤-. …………8分 （Ⅲ）若1=a 时，由（2）知x x
x
x f ln 1)(+-=在[)+∞,1上为增函数， 当1>n 时，令1-=
n n
x ，则1>x ，故0)1()(=>f x f ， 即01ln 11ln 1
111>-+-=-+---
=??
? ??-n n n n n n n n n n n f ，∴1ln 1n n n >-．…….14分
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第Ⅰ卷(选择题） 第一部分听力(共两节，满分30分) 第一节：（共5小题；第小题1.5分，满分7.5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C 三个选项中选出最佳答案，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1. What will the woman do this year？ A. Stay at a hotel B. Rent a house C. Buy some furniture 2. When does the conversation take place? A. At a school B. At a party C. At a dentist’s 3. How does one get to Linden Street ? A. By taking the No.1 train B. By crossing a park C. By finding the downtown platform 4. Why does the man want to apologize? A. He is sorry that the woman’s homework is so terrible. B. He has forgotten to bring her homework. C. He won’t finish his homework until tomorrow. 5. What can we learn about the scheduled flight?
A. It takes off every Tuesday morning. B. The fare is $428 return. C. There are no discounts. 第二节:(共15小题;每小题1.5分,共22.5分) 听下面5段对话。每段对话后有一个小题，从题中所给的A.B.C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读两遍。 听第六段材料，回答第6－7题。 6. How are the speakers spending the weekend? A. Listening to music B. Camping out C. Staying at home 7. What does the woman think the man’s idea is like? A. Great B. Not so good C. Just so-so 听第七段材料，回答第8----9题。 8. What does the woman dislike? A. Parties in her house B. Mozart C. Coca-Cola 9. What will the woman do tonight? A. Drink some Coca-Cola B. Stay with her cousin C. Move to Japan 听第八段材料，回答第10----12题。 10. What is the relationship between the speakers?
2019年度高二英语期末试卷
2019年度高二英语期末试卷 第一部分听力（共两节，满分20分） 第一节（每小题1分，共5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1. Where is Linda now? A. In the woman’s office B. In the classroom. C. In the library 2. What would the man like to do? A. To visit his parents. B. To drive to the countryside. C. To travel to another country. 3. What is the man going to do? A. Talk to more students. B. Collect more information C. Work on a research paper. 4．Where can the man get the tickets？ A. From the club. B. From Susan. C. From Tom. 5. What does the woman mean? A. She is warm enough. B. She has to study in. C. She likes the idea. 第二节（每小题1分，共15分） 第二节（共15小题；每小题1.5分，满分22. 5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题给出5秒钟的作答时间。每段对话或独白读两遍。听第6段材料，回答第6至7题。 6. What’s the probable relationship between the speakers? A.Police officer and thief. B.Shop assistants and customer. C. Manager and clerk. 7.What are the speakers going to do? A.Have a meeting. B. Make a plan. C. Open a store. 听第7段材料，回答8至10题。
高二下学期期末考试物理试题及答案
一、选择题（本大题共12小题，每小题4分，在每小题给出的四个选项中，第1?8小题只有一项符合题目要求，第9?12小题有多项符合题目要求。全部选对的得4分，选对但不全的得 2分，有选错或不选的得 分 。 ） 1. 一带电粒子所受重力忽略不计，在下列情况下，对其运动的描述正确的是 A.只在匀强磁场中，带电粒子可以做匀变速曲线运动 B.只在匀强磁场中，带电粒子可能做匀变速直线运动 C.只在电场中，带电粒子可以静止 D.只在电场中，带电粒子可以做匀速圆周运动 2.如图所示，a 、b 为两根平行放置的长直导线，所通电流大小相同、方向相反。关于a 、b 连线的中垂线上的磁场方向，画法正确的是 3.如图所示，电源内阻不可忽略。已知定值电阻R1=10Ω ,R2=8Ω。当开关S 接位置1时，电流表示数为0.20 A 。当开关S 接位置2时，电流表示数可能是 A.0.28A B.0.25 A C.0.22A D.0.16A 4.从地面以速度0υ竖直上抛一质量为m 的小球，由于受到空气阻力，小球落回地面的速度减 为0υ/2。若空气阻力的大小与小球的速率成正比，则由此可以计算 A.上升阶段小球所受重力的冲量 B.下落阶段小球所受空气阻力的冲量 C.小球加速度为0时的动量 D.下落阶段小球所受合力的冲量 5.如图所示，足够大的光滑绝缘水平面上有三个带电质点A 、B 和C 、A 和C 围绕B 做匀速圆周运动，恰能保持静止，其中A 、C 和B 的距离分别是L 1和L 2。不计三质点相互之间的万有引力，则下列分析正确的是 A.A 、C 带异种电荷，A 和C 的比荷之比为3 21)( L L B.A 、C 带同种电荷，A 和C 的比荷之比为3 2 1)( L L
高二上学期期末考试英语试题
上学期期末调研考试 高二英语试题卷 注意事项： 1．答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。 2．回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。 3．考试结束后，将答题卡交回。 第一部分听力（共两节，满分30分） 做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。第一节（共5小题：每小题1．5分，满分7．5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题，每段对话仅读一遍。 例：How much is the shirt? A．￡19．15．B．￡9．18．C．￡9．15． 答案是C。 1．How many times has the woman been to China? A．Once. B．Twice. C．Three times. 2．How much will the man have to pay in all? A．$60 B．$70 C．$76 3．What is the woman probably going to do? A．Perform a concert. B．Give a speech. C．Practice singing. 4．What is probably the woman’s job?. A．Secretary. B．Coach. C．Manager. 5．Where does the woman advise the man to apply for a job? A．At a shop. B．At a school. C．At a factory. 第二节（共15小题；每小题1．5分，满分22．5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听第6段材料，回答第6、7题。 6．What’s the probable relationship between the speakers?
2018年福建省泉州市中考数学试卷(含答案)
2018年福建省泉州市初中毕业、升学考试 数 学 试 题 （满分150分，考试时间120分钟） 友情提示：所有答案都必须填涂在答题卡的相应的位置上，答在本试卷一律无效. 毕业学校_________________姓名___________考生号_________ 一、 选择题(共7小题，每题3分，满分21分；每小题只有一个正确的选项，请在答题 卡的相应位置填涂) 1. 7-的相反数是（ ）. A. 7- B. 7 C.7 1- D. 71 解：应选B 。 ⒉4 2)(a 等于（ ）. A.4 2a B.2 4a C.8 a D. 6 a 解：应选C 。 ⒊把不等式01≥+x 在数轴上表示出来，则正确的是（ ）. 解：应选B 。 ⒋下面左图是两个长方体堆积的物体，则这一物体的正视图是（ ）. 解：应选A 。
⒌若4-=kx y 的函数值y 随着x 的增大而增大，则k 的值可能是下列的（ ）. A .4- B.2 1 - C.0 D.3 解：应选D 。 ⒍下列图形中，有且只有两条对称轴的中心对称图形是（ ）. A .正三角形 B.正方形 C.圆 D.菱形 解：应选D 。 ⒎如图，点O 是△ABC 的内心，过点O 作EF ∥AB ，与AC 、BC 分别交于点E 、F ，则（ ） A .EF>AE+BF B. EF2020高二语文下学期期末试题及答案
注意事项： 1．答题前，请务必将自己的姓名、考试证号填涂在答题纸相应位置，并认真核对。所有答案在答题纸上完成。 2．本试卷第4题，选物理考生做甲题，选历史考生做乙题。 3．作答选做题时，需用2B铅笔将选做的试题号所对应的口涂黑。 一、语言文字运用(15分) 1．下列词语中加点的字，读音都不相同的一组是(3分) A．创．伤重创．踉跄．寒伧．沧．海桑田 B．揣．测挣揣．瑞．雪脚踹．惴．惴不安 C．果脯．胸脯．花圃．店铺．惊魂甫．定 D．纤．细纤．夫忏．悔歼．灭时过境迁． 2．下列各句中，没有语病 ．．．．的一句是(3分) A．对调整高考录取方案，有人认为最好能对选修科目按分数划 等级，有人认为可以按文理分别划线，这样才比较公平。 B．中国建设部官员指出，房地产领域的官商勾结、权钱交易问 题相当严重，已成为腐败现象易发多发的重点领域，引起中央的高度 重视。 C．2009年4月22日是第40个世界地球日，国土资源部确定我国地球日的主题是“认识地球保障发展——了解我们的家园深部”，目的是唤醒人们爱护地球、保护家园的意识和行为。 D．阅读经典，能使生命达到一种自由的状态，使我们以一种全 新的眼光看待自我与世界，从而提升生命质量。
3．用准确简明的语句压缩下面这个语段。(不超过40个字)(3分) 眼前就物候来说，不但已不是春天，而且也已经不是夏天：眼前是 西风劲吹、落叶辞树的深秋天气。“悲哉秋之为气也”，眼前是古代诗人高呼“悲哉”的时候。然而在这秋之声大合唱中，在我们燕园图书馆的 草坪上，在黄叶丛中，在红树枝下，我看到的却是阳春艳景，姹紫嫣 红，这些男女大孩子一下子变成了巨大的花朵，一霎时，开满了校园。连黄叶树顶上也似乎开出了碗口大的山茶花和木棉花，红红的一片， 把碧空都映得通红。至于那些“红于二月花”的霜叶，真的变成了红艳 艳的鲜花。整个燕园变成了一座花山，一片花海。 4．甲(选物理考生做)下面是校长在一次高三学生大会上讲话的一部 分，假如你是听众之一，请根据校长讲话的内容回答后面的问题。(6分) 离高考的日子越来越近了，老师们的辅导也越来越勤了，同学们 的学习也越来越紧了，大家都在做最后的冲刺。据反映大多数同学每 晚伏案读书做练习要到12点钟，这种精神是可贵的。但也有老师反映相当一部分同学课堂上精神不振，昏昏欲睡，课堂学习效率大打折扣。 校长肯定的是： 校长否定的是： 校长的目的是： 乙(选历史考生做)“空城计”是《三国演义》中一个有名的故事，请 写出该故事中蜀魏双方的主帅并概述主要情节，不超过100个字。(6分)
高二英语下学期期末考试试题(含答案)
第二学期期末考试 高二级 英语试卷 第一部分 阅读理解（共两节，满分40分） 第一节：（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A 、B 、C 和D ）中，选出最佳选项，并在答题卡上将该项 涂黑。 A Shakespeare’s Birthplace and Exhibition of Shakespeare’s World Welcome to the world-famous house where William Shakespeare was born in l564 and where he grew up. The property (房产) remained in the ownership of Shakespeare’s family until 1806.The House has welcomed visitors traveling from all over the world for over 250 years. ◆Enter through the Visitors’ Centre and see the highly-praised exhibition Shakespeare’s World, a lively and full introduction to the life and work of Shakespeare. ◆Stand in the rooms where Shakespeare grew up. ◆Discover examples of furniture and needlework from Shakespeare’s period. ◆Enjoy the traditional (传统的) English garden, planted with trees and flower mentioned in the poet’s works. ◆The Birthplace is within easy walking distance of all the car parks shown on the map; nearest is Windsor Street(3 minutes’ Walk) ◆The Ho use may present difficulties but the Visitors’ Centre, its exhibition, and the garden are accessible to wheelchair users. ◆The Shakespeare Coffee House(opposite the Birthplace) 1. How much is the admission for a family of two gr own-ups and two children? A.￡9.80. B.￡12.00. C.￡14.20. D.￡16.40. 2. Where is the nearest parking place to Shakespeare’s Birthplace? A. Behind the exhibition hall. B. Opposite the Visito rs’ Centre. C. At Windsor Street. D. Near the Coffee House. 3. A wheelchair user may need help to enter . A. the House B. the garden C. the Visitors’ Cent re D. the exhibition hall B OPENING TIMES: 20 Mar. to 19 Oct. Mon. to Sat. : 9:00 a. m. to 5:00 p. m. Sun: 9:30 a. m. to 5:00 p. m. 20 Oct. to 19 Mar Mon. to Sat : 9:00 a. m. to 4:00 p. m. Sun. : 10:00 a. m. to 4:00 p.m. ADMISSION: Adult: ￡4.90 Child: ￡2.20 Family: ￡12.00 (2 adults+ up to 3 children)
