问题 选择题

据报道,一个普通农民发明了塑料袋小提手,能防止双手被较重的塑料袋勒得发痛.如图,使用这种小提手提塑料袋能(  )

A.减小对手的压强

B.减小对手的压力

C.增大对手的压强

D.增大对手的压力

答案

在压力一定时,增大小提手和手之间的受力面积,可以减小塑料袋对手的压强,使手感到舒服.故A符合题意,C不合题意.

塑料袋对手的压力,等于塑料袋及塑料袋中物体的重,塑料袋及塑料袋中物体的重不变,压力不变.故B、D不符合题意.

故选A.

阅读理解

阅读理解。

     Each year, millions of people go abroad to work, study, or travel. It's a great way to find out what life is

like in another part of the world! You're probably hoping to make new friends and learn about the culture in

your host country everything from attitudes and beliefs to social customs and popular foods. But constantly

having to deal with new situations can be frustrating (挫折), even stressful.

     Homesickness, stress, fear, and confusion are all symptoms of "culture shock". At first, you may feel like

getting on the plane and heading home. It's OK to have those feelings,but the following are some tips to help

you handle the challenges that you will face.

     Don't expect to be perfect. You may feel frustrated that you have culture shock, especially since you

probably spent so much time preparing for your trip. No matter how much information you read, or how

well you speak the host language, it is natural to feel over-whelmed sometimes. If you give yourself some

time, things will gradually get easier.

     Have an open mind. While it's certainly OK to feel frustration or confusion in your new surroundings,

try not to form an opinion about the new culture too soon. Don't think of the host as better or worse, just

different-you'll be more willing to try new things.

     Participate. This is obvious, but everybody needs to be reminded. Just watching life go on around you

isn't good enough. You really need to try things for yourself. Don't worry about making a mistake; people

in your host country will generally be very understanding and willing to help if you have question. Your

study abroad experience is fl unique and special time in your life,one that you'll never forget. If you follow

our suggestions, you'll be able to handle it well, and have a wonderful time. Good luck!

1. What is culture shock?

A. Something you feel surprised at.

B. The problems you have when you go to another country.

C. The frightening feelings you have.

D. Something different from your own culture.

2. What should you do when you feel depressed?

A. Go back to your own homeland.

B. Talk to someone about your problem.

C. Give yourself some time to get used to it.

D. Stop thinking of it.

3. Which of the following statements is WRONG?

A. It is natural to feel overwhelmed sometimes.

B. Not everything is perfect.

C. Try to form the opinion about the new culture as soon as possible.

D. Tell others about your problems.

4. What is the main idea of this article? 

A. How to overcome culture shock.

B. Why do people have culture shock.

C. Who might have culture shock.

D. When will you have culture shock.

单项选择题