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问题 单项选择题

缓冲器的工作原理与减振器相同，一方面借助压缩弹性元仵来缓和冲击作用力；另一方面在变形过程中（）。

A、减轻振动 

B、吸收冲击能量 

C、减小纵向力 

D、减小车辆冲击速度

答案

参考答案：B

阅读理解

Accident Report Form
Accident
A car hit a tree.
Four people were in the car.
Weather condition
There was a heavy rain.
Cause
The driver named Li Jun drank too much.
Date of call
March 20th, 2008
Time of call
8:30 p.m.
Name of caller
A man called Zhang Wei.
(He was taking a walk there at that time.)
Place
Zhongshan Road, Nanjing
Conditions of
victims (受害者)
Mr. Green hurt his head.
Mrs. Green hurt her left leg.
Their daughter felt frightened.
Their dog died.
Action
Policemen arrived at 8:40 p.m. and sent the victims to Gulou Hospital at 8:45 p.m.
小题1: What time did Zhang Wei call the police?
A．At 8:30 a. m. B．At 8:30 p. m. C．At 8:40 p. m. D．At 8:45 p. m.
小题2:How many people were there in the cars?
A．One. B．Two. C．Three. D．Four.
小题3: Whose left leg was hurt?
A．Mrs. Green’s. B．Their daughter’s. C．Mr. Green’s. D．Their dog’s.
小题4: What was the weather like that day?
A．It was sunny. B．It was snowy. C．It was cloudy. D．It was rainy.
小题5: Which of the following is TRUE?
A．The car hit a wall.
B．The accident happened on Zhongshan Road in Beijing.
C．The driver drank too much.
D．The policemen arrived half an hour later and sent the victims to the hospital.
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单项选择题

工件在切削过程中所产生的误差是（）。

A.制造误差

B.安装误差

C.加工误差

D.系统误差
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