V. Choose the best answer (选择最恰当的答案): (共26分)
31. Shopping online is really ________ useful and convenient way for us to buy what we want.
A) a B) an C) the D) /
Ⅰ. Listen and choose the right picture(根据你听到的内容,选出相应的图片): (共6分)
A B C D
E F G
1. ______ 2. ______ 3. _______ 4. ______ 5. ______ 6._______
Ⅱ. Listen to the dialogue and choose the best answer to the question you hear(根据你听到的对话和问题,选出最恰当的答案): (共10分)
7. A)Volleyball. B) Football.
C) Basketball. D)Tennis.
8. A) In a library. B) In a zoo.
C) At school. D) In a bookstore.
9. A) Red. B) Red and black.
C) White. D) Blue.
10. A) On foot. B) By bus.
C) By bicycle. D) By underground.
11. A) Rainy. B) Hot.
C) Sunny. D) Windy.
12. A) Because she is free. B) Because she won’t have dinner tonight.
C) Because she has to look after her mother. D) Because she is ill in hospital.
13. A) Staying at home. B) Having a picnic.
C) Watching TV. D) Going swimming.
14. A) At 7:15. B) At 7:30.
C) At 7:45. D) At 8:00.
15. A) Frightened. B) Happy.
C) Surprised. D) Excited.
16. A) Teacher and student. B) Clerk and customer.
C) Doctor and patient. D) Manager and worker.
Ⅲ. Listen to the passage and tell whether the following statements are true or false(判断下列句子是否符合你听到的短文内容, 符合的用“T”表示,不符合的用“F”表示): (共7分)
17. A farmer wanted to sell his small dogs so he painted an advertisement outside.
18. The farmer gave the boy a good deal of money instead of a small dog.
19. The boy couldn’t find any money in his pocket.
20. The boy noticed a smaller dog moving slowly near the doghouse.
21. The dog was unable to run, so the boy didn’t want to buy the dog.
22. The boy could run well himself although he had a bad wound in his leg.
23. The story tells us that many people in the world also need someone who understands them.
Ⅳ. Listen to the passage and fill in the blanks (听短文完成空格,每空格限填一词):(共7分)
24. The beautiful scenery in the University of Oxford ________ us at first.
25. We felt very happy to hear that we were the first visitors under the age of ________.
26. Christ Church is the ________ and most famous college at Oxford.
27. Christ Church was also one of the _________ for the Harry Potter series.
28. At noon, we were served turkey, steak, and _________ at a long table.
29. It took us the ________ afternoon to tour around the campus (校园) and take photos.
30. We thought that talking with Mr. Andrew about the University was _________.
Part 2 Vocabulary and Grammar
25.(20分)
如图所示,空间有场强的竖直向下的匀强电场,长的不可伸长的轻绳一端固定于点,另一端系一质量的不带电小球,拉起小球至绳水平后,无初速释放。另一电荷量、质量与相同的小球,以速度水平抛出,经时间与小球与点下方一足够大的平板相遇。不计空气阻力,小球均可视为质点,取。
(1) 求碰撞前瞬间小球的速度。
(2) 若小球经过路到达平板,此时速度恰好为O,求所加的恒力。
(3) 若施加恒力后,保持平板垂直于纸面且与水平面的夹角不变,在点下方面任意改变平板位置,小球均能与平板正碰,求出所有满足条件的恒力。
24.(19分)
如图所示,电源电动势内阻,电阻。间距的两平行金属板水平放置,板间分布有垂直于纸面向里、磁感应强度的匀强磁场。闭合开关,板间电场视为匀强电场,将一带正电的小球以初速度沿两板间中线水平射入板间。设滑动变阻器接入电路的阻值为,忽略空气对小球的作用,取。
(1) 当时,电阻消耗的电功率是多大?
(2) 若小球进入板间做匀速度圆周运动并与板相碰,碰时速度与初速度的夹角为,则是多少?
23.(16分)
质量为M的拖拉机拉着耙来耙地,由静止开始做匀加速直线运动,在时间t内前进的距离为s。耙地时,拖拉机受到的牵引力恒为F,受到地面的阻力为自重的k倍,把所受阻力恒定,连接杆质量不计且与水平面的夹角θ保持不变。求:
(1)拖拉机的加速度大小。
(2)拖拉机对连接杆的拉力大小。
(3)时间t内拖拉机对耙做的功。
22.(17分)
(1)①用多用电表探测图甲所示黑箱发现:用直流电压挡测量,E、G两点间和F、G两点间均有电压,E、F两点间无电压;用欧姆测量,黑表笔(与电表内部电源的正极相连)接E点,红表笔(表电表内部电源的负极相连)接F点,阻值秀小,但反接阻值很大。那么,该黑箱内元件的接法可能是图乙中 。
②在物理兴趣小组活动中,一同学利用下列器材设计并完成了“探究导体阻值与长度的关系”的实验。
电压表V 量程3V 内阻约为900
电压表V 量程10V 内阻约为3K
电压表A 量程60mA 内阻约为5
电源E1 电动势1.5V 内阻约为0.2
电源E2 电动势4.5V 内阻约为0.4
滑动变阻器(最大阻值为10)。粗细均匀的同种电阻丝,开关、导线和刻度尺
其主要实验步骤如下:
A.选取图中器材,按示意图连接电路
B.用伏安法测定电阻丝的阻值R
C.用刻度尺没出电阻丝的长度L
D.依次减小电阻丝的长度,保持电路其他部分不变,重复步骤B、C
E.处理数据,根据下列测量结果,找出电阻丝值与长度的关系
L(m) |
0.9956 |
0.8049 |
0.5981 |
0.4021 |
0.1958 |
R() |
104.8 |
85.3 |
65.2 |
46.6 |
27.1 |
为使实验尽可能准确,请你对上述步骤中画线处加以改进。
(I)
(II)
(2)有4条用打点计时器(所用交流电频率为50Hz)打出的纸带A、B、C、D,其中一条是做“验证机械能守恒定律”实验时打出的。为找出该纸带,某同学在每条纸带上取了点迹清晰的、连续的4个点,用刻度尺测出相邻两个点间距离依次为S1、S2、S3。请你根据下列S1、S2、S3的测量结果确定该纸带为 。(已知当地的重力加速度为9.791m/s2)
A.61.0mm 65.8mm 70.7mm B. 41.2mm 45.1mm 53.0mm
C.4936mm 53.5mm 57.3mm D. 60.5mm 61.0mm 60.6mm
21、如图所示,圆弧虚线表示正点电荷电场的等势面,相邻两等势面间的电势差相等。光滑绝缘直杆沿电场方向水平放置并固定不动,杆上套有一带正电的小滑块(可视为质点),滑块通过绝缘轻弹簧与固定点O相连,并以某一初速度从M点运动到N点,OM<ON。若滑块在M、N时弹簧的弹力大小相等,弹簧始终在弹性限度内,则
A、滑块从M到N的过程中,速度可能一直增大
B、滑块从位置1到2的过程中,电场力做的功比从位置3到4的小
C、在M、N之间的范围内,可能存在滑块速度相同的两个位置
D、在M、N之间可能存在只由电场力确定滑块加速度大小的三个位置
第II卷
20.如图所示,电阻不计的平行金属导轨固定在一绝缘斜面上,两相同的金属导体棒a、b垂直于导轨静止放置,且与导轨接触良好,匀强磁场垂直穿过导轨平面。现用一平行于导轨的恒力F作用在a的中点,使其向上运动。若b始终保持静止,则它所受摩擦力可能
A.变为0 B . 先减小后不变
C . 等于F D.先增大再减小
19.图甲所示电路中, 为相同的电流表,C为电容器,电阻的阻值相同,线圈L的电阻不计。在某段时间内理想变压器原线圈内磁场的变化如图乙所示,则在时间内
A.电流表的示数比的小
B.电流表的示数比的小
C.电流表和的示数相同
D.电流表的示数都不为零
18.用波长为的紫外线照射钨的表面,释放出来的光电子中最大的动能是4.7。由此可知,钨的极限频率是(普朗克常量h=6.63·s),光速c=3.0/s,结果取两位有效数字)
A.5.5Hz B .7.9Hz C . 9.8Hz D .1.2Hz
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