问题 实验题

在“用单摆测定重力加速度”的实验中:

(1)在测定单摆摆长时,下列操作正确的是__________。

A.装好单摆,抓住摆球,用力拉紧,测出摆线的悬点到摆球球心之间的距离

B.让单摆自由下垂,测出摆线长度再加摆球直径

C.取下摆线,测出摆线长度后再加上摆球半径

D.测出小球直径,把单摆固定后,让小球自然下垂,用刻度尺量出摆线的长度,再加上小球半径(2)两个同学利用假期分别去参观北京大学和香港大学的物理实验室,各自在那里利用先进的DIS系统较准确地探究了“单摆的周期T与摆长L的关系”,它们通过校园网交换实验数据,并由计算机绘制了T2L图象,如图甲所示。在北京大学的同学所测实验结果对应的图线是________(选填“A”或“B”)。另外,在香港大学的同学绘制了在同一地点做的两种单摆的振动图象,如图乙所示,则两单摆摆长之比=__________。

答案

(1)D;(2)B,

阅读理解

阅读理解。

     Many people like to travel by plane, but I don't like it because an airport is usually far from the city.

You have to get there early and wait for hours for the plane to take off and it is often late. You can't open

the windows. You can't choose the food. Planes are fast, but they still take hours to go out of the airport

and into the city.

     I like traveling by train. I think trains are safe. Railway stations are usually in cities. When you are late

for a train, you can catch another one. You can walk around in the train and open the windows. You can

see many interesting things on your way. I know it takes a little more time. I also like cars. You can start

your journey when you want to, and you don't need to get to a railway station or a bus stop. Also you can

carry many things with you in a car. But sometimes there are too many cars on the road.

1. Why do many people like to travel by plane?

A. Because it is fast.

B. Because it is safe.

C. Because you can walk around in the plane.

D. Because it is cheap.

2. Which is not the good thing about the train?

A. It is safe.

B. It takes a little more time.

C. You can open the windows.

D. You can walk around in the train.

3. If you want to take a lot of things with you, what do you take to go out?

A. A bus.

B. A car.

C. A train.

D. A bike.

4. What is the bad thing about the car?

A. You needn't go to a station.

B. You can start your journey when you want to.

C. There are too many cars on the road.

D. You needn't go to a bus station.

5. What does the writer think of the plane, the train and the car?

A. He thinks it takes a lot of time to go to and get out of the airport.

B. He likes to take a train because it takes a little more time.

C. He likes to take a car because he has a car.

D. He likes to take a plane because it's fast.

填空题