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问题 选择题

传送机的皮带与水平方向的夹角为，如图所示，将质量为m的物体放在皮带传送机上，随皮带一起向下以加速度a(a>gsin)匀加速直线运动，则

A．小物体受到的支持力与静摩擦力的合力可能等于mg

B．小物体受到的静摩擦力的方向沿皮带向下，大小是ma

C．小物块受到的静摩擦力的大小可能等于mgsinα

D．小物块受到的重力和静摩擦力的合力的方向可能沿皮带方向向下

答案

AC

阅读理解

When asked to point out one or two things that are most important to themselves, many put friends ahead of homes, jobs, clothes and cars.

A true friendship carries a long history of experience that determines who we are and keeps us connected. It is a treasure we should prove it. Unfortunately, the better friends you are, the more probably you’ll have disagreements. And the result can be what you don’t want an end to the relationship.

The good news is that most troubled friendships can be mended. First, don’t let your pride get in your way. Most of us can forgive each other when differences are brought out in the open. Second, apologize when you’re wrong ― even if you’ve been wronged. Over the course of friendship, even the best people make mistakes. Sometimes, it may be best if the wronged person takes wrong. Third, see things from your friend’s point of view. And finally, accept that friendships changes as our needs and lifestyles change. Making friends can sometimes seem easy. The hard part is keeping the connections strong during the nature ups and downs that have an effect on all relationships. My suggestion: Consider friendship an honor and a gift, and worth the effort to treasure and nurture(培养).

小题1:The “wronged person” underlined in the text refers to a person _______.

A．who has been mistaken for another

B．who has been blamed unfairly

C．who has treated friends badly

D．who has admitted his mistakes小题2:According to the text a friendship can last long only if________.

A．we treat our disagreements wisely

B．we know our friends mistakes

C．we have much in common

D．we have known one another for long小题3:What should we do if we follow the author’s second suggestion?

A．Stick to our own points of view.

B．Avoid making mistakes.

C．Make an apology first.

D．change our lifestyles.
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完形填空

A. turn  B. eagerly  C. concerned  D. anxiously  E. growing   F. changed G. produced H. international   I. popular   J. called
 
There have been a lot of changes in American eating habits in the last ten years. One is the __小题1:__ awareness of the nutritional value of food. Another is an increasing interest in a variety of __小题2:__ foods. Since about 1970, Americans have been more and more __小题3:__ about health. They have begun to notice the ingredients（配料） in what they eat.
When they select food in the supermarket, they __小题4:__ the package over to read the labels carefully. They prefer to eat food that is __小题5:__ without unnecessary chemicals and often choose fruits and vegetables grown without poisons used to kill insects. A small group of Americans, __小题6:__ vegetarians, has decided not to eat meat. They choose a complete diet from other kinds of food because they think that meat products are not good for health.
Also more and more Americans have become interested in food from other countries. They have been going out to international restaurants and __小题7:__ trying unfamiliar dishes. Chinese, Japanese, French, Italian, and Greek cooking as well as many other recipes（食谱） are all __小题8:__ these days in the United States. People used to say that Americans ate uninteresting, unhealthy food, but this has __小题9:__ in the last ten years.
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