篇一：2016皖南八校理数一二三次联考
皖南八校2016届高三第一次联考
一、选择题：本大题共12小题；每小题5分，共60分．
1．在复平面内，复数（4＋5i）i（i为虚数单位）的共轭复数对应的点位于 A．第一象限 B．第二象限 C．第三象限 D．第四象限 2．已知集合A＝｛x｜2－3x－2x2＞0｝，B＝｛x｜y＝ln（x2一1）｝，则A?B＝ A．（一2，一1） B．（一?，一2）U（1，＋?） C．（一1，3．在△ABC中，AB＝1，AC＝3，B＝600，则cosC＝ A．一
1
）D．（一2，一1）U（l，＋?） 2
55 B． C
D
660.3
1?1?
4
．设a?log3,b???,c?log2(log2，则
4?3?
A．b＜c＜a B．a＜b＜c C．c＜a＜b D．a＜c＜b 5．要得到函数f（x）＝cos(3x? A．向左平移
?
4
的图象，只需将函数g（x
1
x?sin3x的图象 2
5?5???
个单位 B．向左平移个单位 C．向左平移个单位 D．向左平移个单位 12361236
＊
6．已知数列｛an｝满足a1＝1，an－1＝2an（n≥2，n?N），则数列｛an｝的前6项和为
63127
A、63B．127C．D．
6432
7
??，则sin?的值为 ?cos)?22127B、－ C、D、－
399 A
????????
8、已知平行四边形ABCD的对角线分别为AC，BD，且AE?2EC，点F是BD上靠近D的四等分点，则
9、下列函数中，在区间（0,1）上单调递增的有
A、0个B、1个 C、2个 D、3个 10、下列命题中是真命题的为 A．“存在”的否定是‘不存在”
222
B．在△ABC中，“AB＋AC＞BC”是“△ABC为锐角三角形”的充分不必要条件
C ．任意 D、存在
x?y??2?3?
11·己知实数x，y满足?y?2x?4，直线（2＋?）x一（3＋?）y＋（l一2?）＝0（??R）过定点
?2x?3y?12?0??
A(x0,y0)，则z?
y?y0
的取值范围为 x?x0
A、［
1111
，7］B、［，5］ C、（－?，］?［7，＋?］ D、（－?，］?［5，＋?］ 5757
3
2
l2．已知函数f(x)?2ax?3,g(x)?3x?2，若关于x的方程f（x）一g（x）有唯一解x0，且x0?（0，＋?），则实数a的取值范围为
A·（一?一1） B．（一l，0） C．（0，1） D．（1，＋?） 二、填空题：共20分．把答案填在题中的横线上．
13．由曲线y?x与曲线y?|x|围成的平面区域的面积为· 14．已知函数
图象关于原点对称．则实数a
的值构成的集合为
2
15．已知直角梯形ABCD中，AB∥CD，∠BCD＝600，E是线段AD上靠近A的三等分点，F是线段DC的中
????????
点，若AB＝2，ADEB?EF＝
16．设数列｛an｝的前n项和为｛Sn｝，已知a1＝1，an＋1＝2Sn＋2n，则数列｛an｝的通项公式 an＝ 三、解答题： 已知函数
（I）求函数f（x）的解析式； （II）若在〔一
．
?2?
6,3
〕内，函数y＝f（x）十m有两个零点，求实数m的取值范围．
18．（本小题满分12分）
已知等差数列｛an｝的前n项和为Sn，且a1＝1，S10＝55． （I）求数列｛an｝的通项公式； （II）若数列｛bn｝满足b1＝l，，求数列的前n项和Tn．
19．（本小题满分12分）
已知函数f（x）=x2
?2ax＋b，x?［一l，l］的最大值为M．
（I）用a，b表示M；
（II）若b=a2，且对任意x?[0，2?]，sin2x一2x十4≤M，求实数a的取值范围．20．（本小题满分12分）
在△ABC中，a，b，c分别为内角A， B，C的对边，AM是况边上的中线，G是AM上的点，且???AG??2????GM?．
（I）若△ABC三内角A、B、C满足sinA：sinB：sinC
1：2，求sinC的值． （II）若，当AG取到最小值时，求b的值．
21．（本小题满分12分）
设函数f（x）＝
（I）求函数f（x）的极值；
（II）已知g（x）＝f（x＋1），当a＞0时，若对任意的x≥0，恒有g（x））≥0，求实数a的取值范围．
23．（本小题满分10分）选修4一4：坐标系与参数方程
在平面直角坐标系xoy中，直线l的参数方程是??x?t?
y?3t?a以O为极点，x轴非负半轴为极
轴建立极坐标系，曲线C
的极坐标方程为????
?
4
)·
（I）求曲线C的直角坐标方程；
（II）若直线l过点（2，3），求直线l被圆C截得的弦长．24．（本小题满分10分）选修4一5：不等式选讲
已知函数f（x）＝｜2x＋1｜，g（x）＝｜3x一a｜（a?R）． （I）当a＝2时，解不等式：f（x）＋g（x）＞x＋6；
（II）若关于x的不等式3f（x）＋2g（x）≥6在R上恒成立，求实数a的取值范围·
篇二：“皖南八校”2017届高三第二次联考英语试卷
“皖南八校”2017届高三第二次联考英语试卷
2016. 12
第I卷（共100分）
第一部分听力（共两节，满分30分）
做题时，先将答案划在试卷上。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，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 does the man mean?
A. He is too busy. B. He is willing to help. C. He won't offer help.
2. What do we learn about the speakers?
A. They'll keep in touch during the summer vacation.
B. They'll hold a party before the summer vacation.
C. They'll get back to school once in a while.
3. How much did the shoes cost originally?
A. 80 dollars. B.40 dollars. C.20 dollars.
4. When does the conversation take place?
A. In the morning. B. In the afternoon. C. In the evening.
5. What will the speakers probably do?
A . Go to the park by bike. B. Go to the park by bus. C. Not go to the park.
第二节（共1 5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 would the boy rather do?
A. Do the dishes. B. Clean the table. C. Empty the dustbin.
7. What's the relationship between the speakers?
A. Mother and son. B. Sister and brother. C. Teacher and student.
听第 7段材料,回答第 8.9题。
8. Why are the speakers so busy?
A. They're working on a chemistry experiment.
B. They're preparing for so many exams.
C. They have a lot of homework.
9. Where are the speakers?
A. On the campus.B. In the library.C. In the classroom.
听第 8段材料 ,回答第 10至 12题。
10. What is Harrods famous for?
A. Its Food Hall and Egyptian Hall.
B. Its many different kinds of food.
C. Its ancient-style buildings.
11. How does Harrods get most of its power?
A. By getting it from a small town.
B. By producing electricity itself.
C. By getting it from the biggest electricity factory.
12. How many people come in a day in January?
A. 30 ,000. B. 300 ,000. C. 15 ,000 ,000. 听第 9段材料,回答第 13至 16题 。
13. Where is the man?
A. In a hairdresser's.B. In a store. C. In a hotel.
14. How long hasn't the man been here?
A. About one month.B. About two months. C. About three months.
15. How will the man's hair be better according to the woman?
A. By using a good conditioner.
B. By cutting hair usually.
C. By washing hair every day.
16. What does the man think of the woman's advice?
A. He accepts it.
B. He refuses it.
C. He will try it next time.
听第 10段材料 ,回答第 17至 20题 。
17. What is the first thing you should do before going shopping?
A. Buy local newspapers.
B. Call the store to find out the price.
C. Write down the things you are going to buy.
18. Where can you buy things cheaply?
A. In chain stores and supermarkets.
B. In stores with longer open hours.
C. In chain stores and local stores.
19. What is the main idea of the passage?
A. How to buy things cheaply.
B. How to be a clever shopper.
C. How to save money.
20. How many points does the speaker mention as a smart shopper?
A. 2 points. B. 3 points.C. 4 points. 第二部分 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
Bookable study rooms
The Library provides a variety of bookable group study rooms, some with presentation
areas, for groups of between 6 and 12 students to use for team work.
Group study rooms
There are 10 Group Study Rooms on Level 30f Northampton Square Library.
·Rooms 3A, 3F, 3G, 3H,3J and 3K are equipped with presentation area to help prepare group presentations.
·Rooms 3B, 3C, 3D and 3E are intended for group discussion and seminar work. These rooms are equipped with whiteboards. Whiteboard pens can be borrowed from the service desk on Level 2. Please do not use any other writing tools on the whiteboards.
Maximum booking period of 2 hours at one time.
Presentation areas provide:
·LED screen to practice presentation with group colleagues
·Network access on PC with wide range of software
USB port to plug in（插入）your own device or laptop
Assistive（为残疾人设计的）Technology Rooms
Assistive technology rooms are available for students by using ID cards to get access permission and can be booked for a maximum of 4 hours per person per day.
Rooms are equipped with the following software: Dragon, JAWS, Zoom Text, Kurzweil, Supernova, TextHelp and Inspiration. A scanner is provided for use with the assistive software packages. For further information click Guide to Library Services for Additional Needs.
21.lf you and your five team members need to book a room to present a project, which room should you go to?
A. Room 3B. B. Room 3C. C. Room 3E. D. Room 3G.
22. What do we know about Group Study Rooms?
A. They are on Level 2. B. They are equipped with whiteboards.
C. They have no Internet access. D. They provide USB disks.
23. Which of the following is specially provided for students with disability?
A.2 hours per person per day.
B，Whiteboard pens.
C．LED screen.
D.A scanner with assistive software packages.
24. We may read this article on a
A. website B. magazine C. booklet D. story book
B
An early morning winter storm had brought several inches of snow m my small town in the mountains. Schools were canceled, roads were dangerous and all I wanted to do was to stay in bed. Still, I knew I had to get the day started so I put on warm clothes and walked outside. The Yet, when I looked out on the white blanket that covered the ground, I couldn't help but smile a bit. It was so beautiful. It softened the bare trees and hid the dead grass. In the distance I could hear the sound of the snowplow(雪犁) on the road, the barking of a happy dog and the laughter of children playing outside, enjoying their way off from school.
The sweet music of that laughter brought back a hundred memories of winters past. I remembered catching snowflakes (雪花) on my tongue, building snowmen, making snow angles,
running down hills and always losing snowball fights with first my brothers and then my own children. Standing there in that warm coat of memories made the wind a little less cold and my back a little less sore(疼痛的). I turned up my head, stuck out my tongue and for the first time in years caught a snowflake on it. It tasted so fresh and clean. It tasted like youth, like joy and like love.
May you always feel young in spirit, no matter how old or achy your body may be. May you always delight in the simple joys of life. May you always share your happiness with the hearts of children. And may you always give your love, your light, your laughter and your warmth to others even on the coldest days.
25. What was the author's first reaction when he knew it snowed heavily?
A. He was upset. B. He was happy.
C. He was thankful. D. He was moved.
26. From which senses did the author describe the joy of having snow?
A. Taste and smell. B. Sight and smell.
C. Smell, hearing and taste. D. Sight, hearing and taste.
27. What does the author mainly want to tell us with this article?
A. Appreciate every snowstorm you spend with your family.
B. Snow brings both fun and trouble.
C. Memories can change our opinion.
D. We should stay young at heart.
28. From the underlined sentence in Paragraph l, we can know that “ ".
A. my back ached because of the cold weather.
B. I didn't want to start my day on such a snowy day.
C. my back would ache upon thinking of cleaning up the snow.
D. the snow didn't stop and I felt too cold.
C
The Man Booker Prize for Fiction is awarded for a novel written by a writer from the Commonwealth or the Republic of Ireland and it aims to represent the very best in contemporary fiction. The prize was originally called the Booker-McConnell Prize, which was the name of the company that sponsored it, though it was better-known as simply the ‘Booker Prize’. In 2002, the Man Group became the sponsor and they chose the new name, keeping ‘Booker’.
Publishers can submit books for consideration for the prize, but the judges can also ask for books to be submitted that they think should be included. Firstly, the Advisory Committee gives advice if there have been any changes to the rules for the prize and selects the people who will judge the books. The judging panel changes every year and usually a person is only a judge once.
Great efforts are made to ensure that the judging panel is balanced in terms of gender(性别) and professions within the industry, so that a writer, a critic, an editor and an academic are chosen along with a well-known person from wider society. However, when the panel of judges has been decided, they are left to make their own decisions. Meanwhile, the prize sponsor has no further right to take part in any more.
The Man Booker judges include critics, writers and academics to maintain the consistent quality of the prize and its influence is such that the winner will almost certainly see the sales increase considerably, in addition to the￡50,000 that comes with the prize.
29. Who can submit books to the prize?
A. Judges. B. Writers. C. Readers. D. Sponsors.
30. Why is the prize named the Man Booker Prize?
A. Because the prize is given to writers from the Commonwealth.
B. Because the prize was known as simply the ‘Booker Prize’.
C. Because the prize is sponsored by the Man Group and they kept the name.
D. Because the prize is aimed to award the very best contemporary fiction.
31. Which task can be done by the Advisory Committee?
A. Changing the rules for the prize on their own.
B. Selecting the judging committee.
C. Making decisions on who is the winner.
D. Submitting books for consideration for the prize.
.
A. the prize money. B. the gender of the judges.
C. the make-up of the panel of judges. D. the increase in sales of the winner.D
Back in the 1860s, a British scientist named Hey Walter Bates noticed something interesting in the animal world: a kind of butterfly, Common Mormon, can change the pattern on its wings so that it looks like another butterfly species, the Common Rose, which is poisonous for birds to eat.
Bates argued that animals develop this ability to protect themselves from being eaten. This theory had been widely accepted by scientists. But one question remains: how do these animals manage to do that?
After more than 150 years, scientists are finally able to answer that question-it is all down to a gene (基因) called “doublesex", according to a study published on March 6 in the journal Nature.
In fact, scientists have long known that genes are responsible for this useful ability. But until the new study, scientists hadn't been able to find out which genes in particular were responsible.
Scientists at the University of Chicago compared the genetic structures of the Common Mormons that changed their wing patterns with those of ones that did not. And all the results pointed to a single gene, “doublesex”.
This was much to the scientists' surprise. They used to expect that something as complex as this would be controlled by many different genes. For example, one gene would control the color of the upper part of the wing, one would do so for the lower part.
However, the “doublesex” gene doesn't quite do everything by itself. Instead, it acts like a switch-it “tells” other genes to change the wing patterns. Isn't that clever?
Scientists believe that this special ability of the “doublesex” gene on Common Mormon was developed throughout the long history of evolution. “The harmless species gains an advantage by resembling something predators (捕食者) avoid,” Sean Carroll, a scientist told Nature. “it was obvious evidence for natural selection. ”
33. How do scientists find the truth of butterfly changing wing patterns?
A. By doing experiment on butterflies. B. By comparing genetic structures.
篇三：安徽省“皖南八校”2016届高三第二次联考理综试题
“皖南八校”2016届高三第二次联考
理 科 综 合
第I卷
可能用到的相对原子质量：H 1 C 12 O 16 S 32 Ca 40 Fe 56
一、选择题：本题共13小题，每小题6分，共78分。在每小题给出的四个选项中，只有一项是符合题目要求的。
1．下列关于细胞的结构与功能的叙述，正确的是
A.甘油进入红细胞的速率取决于膜上载体的数量
B．效应B细胞中的溶酶体可以合成多种分泌蛋白
C．侧芽生长缓慢是因为侧芽细胞不能产生生长素
D．人体中可以合成酶的细胞不一定可以合成激素
2．下图①所示为某动物基因型为AaBb的原始生殖细胞，图②、图③为该动物体内正在分裂的细胞，据图判断下列叙述正确的是
A.①细胞分裂产生的子细胞中染色体数目为4条或8条
B．②细胞处于减数分裂的第一次分裂，其子细胞名称为初级卵母细胞和极体
C．③细胞处于减数分裂的第二次分裂，可能会发生A与a、B与b的分离
D．①细胞有丝分裂时，会发生A与B、a与b或A与b、a与B的自由组合
3．病毒的结构简单，在进化过程中没有优势，但病毒的基因组在复制时容易产生变异，因此又在进化过程中被保留下来。下列关于病毒进化的叙述，正确的是
A.由于病毒的核酸为单链结构，所以病毒更容易发生变异
B．进化过程中致病能力弱而传播能力强的病毒更容易被保留
C．突变和基因重组都能够为病毒的进化提供原材料
D，进化过程中不会出现传播能力和致病能力都强的病毒
4．下列有关基因表达的叙述，正确的是
A.基因的转录和翻译需分别在细胞核中和核糖体上完成
B．参与基因表达的核糖体具有两个tRNA的结合位点
C．一条mRNA可同时结合多个核糖体，共同合成一条肽链，加速蛋白质的合成
D．转录从基因的特定位点开始，到终止密码子结束，该过程一般不需要解旋酶
5．关于种群和群落的叙述，正确的是
A.种内互助有利于种群的发展，种内斗争不利于种群的发展
B．种群密度越大，其种群数量就越多，种内斗争也就越激烈
C．生态系统中捕食者的存在不利于增加物种多样性
D．群落演替都会出现一个相对稳定的顶级群落
6．实验过程中，实验时间的长短有时会对实验结果产生很大的影响。下列各实验中，有关实验时间的长短对实验结果影响的叙述，正确的是
A.证明绿叶在光照下制造淀粉的实验中，实验时间越长积累的淀粉越多，实验现象也越明 显
B．在质壁分离与质壁分离复原的实验中，第二次观察与第三次观察之间所间隔时间的长 短对该实验没有影响
C．赫尔希与蔡斯所做的噬菌体侵染细菌的实验中，保温时间过长或过短对实验结果影响 相同
D．在检测生物组织中的脂肪的实验中，制作好的临时装片放置时间的长短对实验结果的 观察没有影响
7．天津港“8. 12”瑞海公司危险品仓库特大火灾爆炸事故，其二次爆炸威力巨大。据推测可能是由于某物质遇水燃烧而引发的连锁反应。下列常见危险品中最有可能具有这种性质的是
A. KN03 B．NH4NO3 C．CaC2 D．P4（白磷）
8．NA表示阿伏加德罗常数的值，下列叙述正确的是
A.标准状况下，11.2 L的甲醇所含的氢原子数大于2NA
B．常温下，1 mol．L-1的Na2CO3溶液中CO32-的个数必定小于NA
C.1 mol Cu与含2 mol H2SO4,的浓硫酸充分反应，生成的S02的分子个数为NA
D．1 mol苯分子中含有3NA个碳碳双键
9．下列有关实验操作、现象和解释或结论都正确的是
10.青蒿素结构式如图所示。下列有关青蒿素的说法错误的是
A.青蒿素的分子式为C15 H22O5
B．青蒿素分子结构稳定，受热不易分解
C．青蒿素可溶于NaOH溶液，可使酸性高锰酸钾溶液褪色
D．青蒿素难溶于水，提取的方法是用有机溶剂萃取后蒸馏
11.短周期W、X、Y、Z四种元素的原子序数依次增大。W的某种原子无中子，
X、Y形成的简单离子具有相同的电子层结构，且X、Y可形成原子个数比为1：1的具有漂白性的物质，工业上常用电解熔融的YZ来获得Y的单质。下列说法正确的是
A．上述四种元素的原子半径大小顺序为r(Z)>r(Y)>r(X)>r(W)
B．W和X、Y、Z均能形成18电子的分子
C．Y2X和Y2X2中阴、阳离子个数之比均为1:2
D．X、Y、Z三种元素形成的化合物，其水溶液一定呈碱性
12.已知在碱性溶液中可发生如下反应：Fe( OH)3+Cl0-+ OH- 一Fe4n-+ Cl-+ H2O（未配平）。则下列有关叙述错误的是
A.已知FeO4n-中Fe的化合价是+6价，则n=2
B．每产生1molCl-,转移2 mol电子
C．FeO4n-具有强氧化性，一般其还原产物为Fe3+，可用作新型自来水消毒剂和净水剂
D．若n=2，则该反应中氧化剂与还原剂的物质的量之比为2:3
13.常温下，向20 mL 0．2 mol．L-1二元酸H2A溶液中滴加0.2 mol．L-l NaOH溶液，有关 微粒物质的量变化如右图。下列叙述正确的是
A.当V(NaOH)=20 mL时，溶液中各离子浓度的大小
顺序为c(Na+）>c(HA-）>c( A2-)>c( OH-)>
((H+)
B．等体积等浓度的NaOH溶液与H2A溶液混合后，其
溶液中水的电离程度比纯水中的大
C．等浓度H2A和NaHA的混合溶液中无论加入少量的
强酸或强碱，溶液的pH变化都不大
D．当V(NaOH) =40 mL时，升高温度，c(Na+)／c(A2-)减小
二、选择题：本题共8小题，每小题6分，共48分。在每小题给出的四个选项中，第14~18题只有一项是符合题目要求，第19~21题有多项符合题目要求，全部选对的得6分，选对但不全的得3分，有选错的的得0分。
14.物理学是科学家们智慧的结晶，科学家们在物理学的发展过程中做出了重大的贡献，下列叙述符合史实的是
A.伽伸略通过理想斜面实验得出结论“力是改变物体运动的原因”
B.牛顿发现了万有引力定律并利用扭秤实验装置比较准确地测出了引力常量
C.法拉第首先发现电流可以使周围的小磁针发生偏转，称为电流的磁效应
D.安培发现了右手定则，用于判断通电导线在磁场中受到磁场力的方向
15．系绳卫星是航天科学家们受风筝启发而发明的。它以绳或链把卫星与航天飞机、宇宙飞船或空间站连接起来，这样，卫星便可以随时投放或回收。如图所示，有A、B两颗卫星都在圆周轨道上运动，用绳连接，且两颗卫星与地心连线始终在一条直线上，绳子重力不计，则下列说法正确的是（ ）
A．两颗卫星的线速度相等
B．两颗卫星的向心加速度相等
C．地球对A的万有引力提供A的向心力
D．如果绳子突然断开，B将做离心运动
16．在真空中A、B两点分别放有一异种点电荷+2Q和—Q，以AB连线中点O为中心作一正方形路径abcd，a、O、c三点恰好将AB四等分，b、d为AB的中垂线与正方形两边的交点，如图所示，则下列说法正确的是（ ）
A．场强的大小关系有Ea>Ec，Eb=Ed
B．电势Φa<Φc，Φb=Φd
C．在AB连线上O点的场强最小
D．将一正点电荷沿直线由b运动到d的过程中电势能始终不变
17．有一直角V形槽可以绕O点在竖直平面上转动，其截面如图所示，
OB面与水平面间夹角为θ，有一质量为m的正方体均匀木块放在槽
内，木块与OA、OB间的动摩擦因数都为μ。现用垂直于纸面向里的力推木块使之沿槽方向运动，则（ ）
A．若θ=60°时，木块所受的摩擦力为1?
mg 2
B．若θ=60
°时，木块所受的摩擦力为?mg 2
C．θ在0到90°变化过程中，木块所受的摩擦力最大值为μmg
D．θ在0到90
mg
18．在光滑水平面上有一静止的物体，现以水平向右的推力F1作用t秒后，若立刻以水平向左的推力F2作用t秒后物体速度减为0，若不用F2而立刻以水平向左的推力F3作用t秒后物体返回到出发点，则下列说法正确的是（ ）
A．这三个力大小之比F1：F2：F3=1：1：2
B．这三个力大小之比F1：F2：F3=1：1：3
C．这三个力做功之比W1：W2：W3=1：2：3
D．这三个力做功之比W1：W2：W3=1：1：4
19．如图所示的理想变压器，左端输入有效值不变的正弦交流电u，电压表和电流表都是理想电表，忽略小灯泡电阻的变化，则开关S闭合后与闭合前相比较，下列说法正确的是（ ）
A．L1变亮
B．L2变亮
C．电流表A的示数变小
D．电压表V的示数变小
20．如图所示，倾角α=45°的固定斜面上，在A点以初速度v0水平抛出质量为m的小球，落在斜面上的B点，所用时间为t，末速度与水平方向夹角为θ。若让小球带正电q，在两种不同电场中将小球以同样的速度v0水平抛出，第一次整个装置放在竖直向下的匀强电场中，小球在空中运动的时间为t1，末速度与水平方向夹角为θ1，第二次放在水平向左的匀强电场中，小球在空中运动的时间为t2，末速度与水平方向夹角为θ2，电场强度大小都为E=mg/q，则下列说法正确的是（ ）
A．t2>t>t1
B．θ=θ1>θ2
C．θ>θ1=θ2
D．若斜面足够长，小球都能落在斜面上
21．如图所示，两根电阻不计的平行光滑金属导轨在同一水平面内放置，左端与
定值电阻R相连，导轨x>0一侧存在着沿x方向均匀增大的磁场，磁感应强度与x的关系是B=0.5+0.5x(T)
，在外力F作用下一阻值为r的金属棒从A1运动到A3，此过程中电路中的电功率保持不变。A1的坐标为x1=1m，A2的坐标为x2=2m，A3的坐标为x3=3m，下列说法正确的是（ ）
A．回路中的电动势既有感生电动势又有动生电动势
B．在A1与A3处的速度比为2：1
C．A1到A2与A2到A3的过程中通过导体横截面的电量之比为3：4
D．A1到A2与A2到A3的过程中产生的焦耳热之比为5：7
第Ⅱ卷
三、非选择题：包括必考题和选考题两部分。第22题~第32题为必考题，每个试题考生都必须做答。第33题~第40题为选考题，考生根据要求做答。
（一）必考题（共47分）
22．（6分）李明同学在用电火花计时器做“测定匀变速直线运动的加速度”实验时，
（1）电火花计时器是一种使用 （填“交流”或“直流”）电源的计时仪器，它的工作电压是V。
（2）从打出的若干纸带中选出了如图所示的一条（每相邻两点间还有四个点没有画出来），计数点间距如图所示，打点计时器的电源频率是50Hz。
计算出纸带上打下计数点2时小车的瞬时速度为v2m/s；该匀变速直线运动的加速度2。（计算结果保留三位有效数字）
23．（9分）某同学为了测量电流表A1内阻的精确值，实验室有如下器材：
电流表A1（量程300 mA，内阻约为5Ω）；
电流表A2（量程600 mA，内阻约为1Ω）； 电压表V（量程15 V，内阻约为3 kΩ）； 滑动变阻器R1（0～5Ω，额定电流为1 A）； 滑动变阻器R2（0～50Ω，额定电流为0.01A）； 电源E（电动势3 V，内阻较小）； 定值电阻R0 （5Ω）； 单刀单掷开关一个、导线若干。 实验要求待测电流表A1的示数从零开始变化，且多测几组数据，尽可能地减少误差。
（1）以上给定的器材中滑动变阻器应选 ；
（2）在答题卡的方框内画出测量A1内阻的电路原理图，并在图中标出所用仪器的代号；
（3）若选测量数据中的一组来计算电流表A1的内阻r1，则r1的表达式为r1；上式中各符号的物理意义是 。
24．（14分）如图所示，四分之一光滑绝缘圆弧轨道AB与水平绝缘地面BC平滑连接，且O、A两点高度相同，圆弧的半径R=0.5m，水平地面上存在匀强电场，场强方向斜向上与地面成θ=37°角，场强大小E=1×104V/m，从A点由静止释放一带负电的小金属块（可视为质点），质量m=0.2kg，电量大小为q=5×10-4C，小金属块与水平面间的动摩擦因数为μ=0.2，最大静摩擦力等于滑动摩擦力，g=10m/s2（已知sin37°=0.6，cos37°=0.8）。求：
（1）金属块第一次到达B点（未进入电场）时对轨道的压力。
（2）金属块在水平面上滑行的总路程。
《2017皖南八校联考汇总(一、二、三次)》出自：百味书屋
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