(Ⅰ)(6分)为研究滑块的运动,选用滑块、钩码、纸带、毫米刻度尺、带滑轮的木板、

题型:实验题

问题:

(Ⅰ)(6分)为研究滑块的运动,选用滑块、钩码、纸带、毫米刻度尺、带滑轮的木板、以及由漏斗和细线构成的单摆等组成如图1所示的装置,实验中,滑块在钩码作用下拖动纸带做匀加速直线运动,同时让单摆垂直于纸带运动方向做小摆幅摆动,漏斗可以漏出很细的有色液体,在纸带上留下的痕迹记录了漏斗在不同时刻的位置,如图2所示

①漏斗和细线构成的单摆在该实验中所起的作用与下列哪个仪器相同?________(填写仪器序号)

A.打点计时器

B.秒表

C.毫米刻度尺

D.电流表②如果用该实验装置测量滑块加速度,对实验结果影响最大的原因是:___________________________

(Ⅱ)(12分)现提供如下器材,测定定值电阻Rx(约为5KΩ)的阻值

a.两相同电流计G1G2(50μA,内阻约4KΩ)

b.电阻箱R1(0~9999.9Ω)

c.电阻箱R2(0~99999.9Ω)

d.电源E(电动势约3V,内阻不计)

e.滑动变阻器R(最大阻值20Ω)

f.开关两个,导线若干

①由于电流计量程很小,需要先将它们进行改装,某同学设计了用半偏法测电流计内阻的电路,如图,实验过程如下:先将R2调为最大,然后闭合K1K2,调节R1R2,保证­­­_________满偏,使_________半偏(填写元件符号)由此测得电流计G2­­的阻值

②若测得电流计内阻为4.2KΩ,要将G2改装成量程为3V的电压表,需串联的电阻值为___________

③采用改装后的电压表并伏安法测量待测电阻阻值,请在虚线框内画出实验电路图

考点:实验:探究弹力与弹簧伸长的关系实验:探究小车速度随时间变化的规律实验:探究加速度与力、质量的关系实验:探究功与速度变化的关系
题型:实验题

阅读理解.

     Once there was a piano player in a bar. People came just to hear him play. But one night, a lady

asked him to sing a song.

     "I don't sing," said the man.

     But the lady told the waiter, "I'm tired of listening to the piano. I want the player to sing!

     The waiter shouted across the room, "Hey, friend! If you want to get paid, sing a song!'

     So he did. He had never sung in public before. Now he was singing for the very first time! Nobody

had ever heard the song Mona Lisa sung so beautifully!

     He had talent(天赋) he was sitting on! He may have lived the rest of his life as a no-name piano

player in a no-name bar. But once he found, by accident, that he could sing well, he went on working

hard and became one of the best-known singers in the US. His name was Nat King Cole.

     You, too, have skills and abilities. You may not feel that your talent is great, but it may be better

than you think. With hard work, most skills can be improved. Besides, you may have no success at all

if you just sit on your talent.

1. The lady asked the player to sing a song because _____.

A. she had paid him for this

B. she knew him very well

C. she wanted to have a change

D. she enjoyed his singing

2. Nat King Cole succeeded because _____.

A. the lady helped him a lot

B. he caught the chance

C. he continued to play in the bar

D. he stopped playing the piano

3. The words "sit on" in the passage probably mean "_____".

A. 参加

B. 搁置

C. 开发

D. 展示

4. Which could be the best title for the passage?

A. Sing in the Bar

B. Achieve Success in Life

C. Never Lose Heart

D. Find Your Hidden Talent

题型:实验题

A「外は 暗いですから、     。」  B「はい。ありがとうございます。」

A.安心して くださいね

B. しんぱいして くださいね

C.しつれいを して くださいね

D.気を つけて くださいね

题型:实验题

如图所示,在一个绕有线圈的可拆变压器铁芯上分别放一小铁锅水和一玻璃杯水.给线圈通入电流,一段时间后,一个容器中水温升高,则通入的电流与水温升高的是(   )

A.恒定直流、小铁锅

B.恒定直流、玻璃杯

C.变化的电流、玻璃杯

D.变化的电流、小铁锅

题型:实验题

设单链表中节点的结构为(data,link)。已知指针q所指节点是指针p所指节点的直接前驱,若在*q与*p之间插入节点*s,则应执行下列哪一个操作

A.s↑.link:=p↑.link;p↑.link:=s

B.q↑.link:=s;s↑.link:=p

C.p↑.link:=s↑.link;s↑.link:=p

D.p↑.link:=s;s↑.link:=q

题型:实验题

对原电池的有关叙述不正确的是()。

A.在原电池中,在正极发生的是还原反应,在负极发生的是氧化反应

B.原电池是将化学能转换为电能的装置

C.电动势的大小与两个电极的的电极电势有关

D.电动势的数值越大,说明原电池到达平衡的速度越快

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