问题 阅读理解

根据短文内容选择最佳答案,将答案前的标号填写在题前括号内。

     Most English people have three names: a first name, a middle name and the family name. Their

family name comes last. For example, my full name (全名) is Jim Allan Green. Green is my family

name. My parents gave me other (其他的) names.

     People don't use their middle names very much. So "John Henry Brown" is usually called "John

Brown". People never use Mr, Mrs or Miss before their first names. So you can say John Brown,

or Mr Brown; but you should never say Mr John. They use Mr, Mrs Or Miss with the family name

but never with the first name.

     Sometimes people ask me about my name. "Why did your parents call you Jim?" they ask, "Why

did they choose that name? "The answer (答案) is they didn't call me Jim. They called me James.

James was the name of my grandfather. In England, people usually call me Jim for short. That 's

because it is shorter and easier than James.

1. Most English people have ____ names.

A. one  

B. two  

C. three

2. ____ is Jim ' s family name.

A. Jim  

B. Green  

C. Allan

3. English people use Mr, Mrs or Miss with ____.

A. the family name  

B. the first name  

C. the middle name

4. The teacher's name is Mary Joan Shute. Her students call her ____.

A. Miss Shute  

B. Miss Joan  

C. Miss Mary

5. People usually call the writer (作者) Jim instead of (替代) James because ____.

A. it's the name of his grandfather  

B. it's easier for people to call him

C. it's the name that his parents gave for him

答案

1. C  2. B  3. A  4. A  5. B

实验题

气垫导轨装置如图甲所示,由导轨、滑块、挡光条、光电门等组成.在空腔导轨的两个工作面上均匀分布着一定数量的小孔。向导轨空腔内不断通入压缩空气,压缩空气会从小孔中喷出,使滑块稳定地漂浮在导轨上(图乙),这样可忽略滑块所受的摩擦力。

用数字计时器测量滑块通过光电门的时间,从而计算滑块通过光电门时的速度。测量时,在滑块上插一块挡光条,如图丙所示。挡光条前沿经过光电门时开始计时,后沿经过光电门时计时停止,计时器上显示的就是滑块发生位移l所用的时间。

如图所示,某同学用一端安装有光电门的上述气垫导轨AB做验证机械能守恒定律的实验。当光电门中有物体通过时与之连接的数字计时器(图中未画出)能够显示挡光时间。实验中,B端放在水平桌面上,而A端用完全相同的小木块垫高,将滑块自A端由静止释放,由数字计时器记录挡光时间。通过调整A端所垫小木块的数量,改变下落高度,再重复做实验,已知挡光条长度为4.00 cm,。

(1)      A端所有小木块的高度之和即为滑块滑动过程中下落的高度。用游标卡尺测量其中一块小木块的高度如图,其读数为_________cm。

(2)某次实验中,滑块通过光电门时,数字计时器显示挡光时间为2×10-2S,则小滑块通过光电门的速度为____m/s。

(3)根据实验中测量的速度v,滑块下落的高度h,做出随下落的高度h变化的图象,下列各图中正确的是:

(4)若滑块是从C点由静止释放的,还想完成验证机械能守恒定律实验。必须测量下列哪些物理量 (  )

A.数字计时器显示的挡光时间

B.滑块的质量

C.BC两点的高度差

D.AB和BC的长度,所有小木块的高度

单项选择题