问题 单项选择题

挂在壁墙上的石英钟,当电池的电能耗尽而停止走动时,其秒针往往停在刻度盘上“9”的位置。这是由于()。

A. 秒针在“9”位置处受到重力矩的阻碍作用最小

B.秒针在“9”位置处受到重力矩的阻碍作用最大

C.偶然因素造成的

D.分针在“9”位置处受到重力矩的阻碍作用最大

答案

参考答案:B

解析:石英钟的秒针从数字12到数字6的过程中是向下运动的,它所受的重力会帮助秒针顺时针转动。当秒针从数字6向数字12运动时,是上升运动,所受重力会变成阻力阻碍秒针的转动,而秒针转到数字9时阻力臂最长,使重力的阻力矩最大,故秒针最易停在数字9处。本题正确答案为B。

阅读理解

We always want to prepare ourselves to the changes we may face when we go to a different country. Well, I have to say that for me, even after living in the US for one year and a half, I am still not used to the changes of weather, or how to manage my money well. There are many things that can give us culture shocks, but it is up to us whether to make it a big shock or a small one.

I know that changing schools was a big thing for me. It helped me to be stronger and open towards meeting new people.  Sometimes it feels like everybody is already in a group. This makes it harder for someone else to go in. But, it is not that hard. Actually many people know that you are from another country. They feel curious about your “history”, and would often think you are a different man.

Another thing that can produce a shock to me is the sudden change of weather. During the last couple of days, there was an ice-snow storm. It was the biggest in 15 years in the state of Missouri. It was raining ice, really, and you could hear sounds outside the window like little pieces of rocks hitting it, of course it was the ice. It started accumulating so heavily that the University had to close down for two days, and it got worse when it started snowing after the ice storm.

As international students, you may at times find something very difficult, but hey, anyone can beat and overcome it to make studying aboard an unforgettable experience.

小题1:The author has been in the US for          .

A.one year

B.one and a half years

C.two years

D.two and a half years小题2:Changing schools        .

A.was just a small thing for the author

B.made it harder for the author to go into new people’s group

C.helped the author to be stronger and open towards meeting new people

D.made all people think the author was a different man小题3:The underlined word “accumulating” means       in Chinese.

A.堆积

B.融化

C.结冰

D.移动小题4:Which of the following is NOT mentioned to be a shock for the author when he studied in the US?

A. The big changes of weather.  

B. B.Managing money.

C.Changing schools.           

D.Difference in language.

小题5:What is the main idea of this article?

A.We may often change school to get used to living in a different country.

B.The author exercised a lot during the ice-snow storm and became stronger.

C.Students form other countries are curious about American history.

D.Studying abroad is cool though there are difficulties.

单项选择题 A1/A2型题