问题 选择题

关于力和运动的关系,下列说法正确的是

A.物体运动状态改变时一定受到力的作用

B.物体受到力的作用就会运动

C.做匀速直线运动的物体一定不受到力的作用

D.物体受到力的作用运动状态一定改变

答案

答案:A

题目分析:A、力是改变物体运动状态的原因;所以物体运动状态改变时一定受到力的作用,答案A正确;B、物体受平衡力作用,物体处于平衡状态,物体静止或做匀速直线运动.所以答案B不正确;C、做匀速直线运动的物体可能没有受到力的作用也可能受到平衡力的作用,所以答案C不正确;D、物体受到平衡力的作用时运动状态不变,所以答案D不正确;故答案选A。

阅读理解

阅读理解。

     Henry Ford was the first person to build cars which were cheap,strong and fast. He was able to sell

millions of models because be could produce them in large numbers at a time; that is, he made a great many

cars of exactly the same kind. Ford's father hoped that his son would become a farmer, but the young man

did not like the idea and he went to Detroit where he worked as a mechanic (机械师). By the age of 29, in

1892, he had built his first car. However, the car made in this way, the famous "Model T" did not appear

until 1908-five years after Ford had started his great motor car factory. This car showed to be well-known

that it remained unchanged for twenty years. Since Ford's time, this way of producing cars in large numbers

has become common in industry and has reduced the price of many goods which would otherwise be very

expensive.

1. Henry Ford was the man to build _____ cars. [ ]

A. cheap and strong

B. cheap and long   

C. fast and expensive

D. strong and slow

2. Ford was able to sell millions of cars, because _____. [ ]

A. he made many great cars

B. his cars are many   

C. he made lots of cars of the same kind

D. both A and B

3. The young man became a mechanic, _____. [ ]

A. which was his father's will

B. which was against his own will

C. which was against his father's will

D. which was the will of both

4. The "Model T" was very famous _____. [ ]

A. before 1908

B. between 1982 and 1908

C. before 1892

D. after 1908

5. Ford built his own car factory _____.[ ]

A. in 1903

B. in 1908

C. in 1913

D. in 1897

单项选择题