问题 单项选择题

若一个外部变量的定义形式为static int x;,那么,其中static的作用应该是_______。

A.将变量存储在静态存储区

B.使变量x可以由系统自动初始化

C.使x只能在本文件内引用

D.使x的值可以永久保留

答案

参考答案:C

解析:[评析] 事实上,无论有无static修饰,外部变量都具有A、B和C三种特性。作为一种修饰,static仅是限制此类型外部变量的引用范围:只能在定义它的文件范围内使用。

阅读理解

How to Become Fit?

Healthy eating habit along with regular exercise is the only way to become fit. If you have the correct number of calories and exercise regularly, you will lose weight, keep fit, and feel great, too.

During your teenage years, it is important to give your body the energy it needs. If you skip (跳过) meals, you won’t get enough calories, and then you will feel tired. By the way, calorie is just another word for energy. About 50% of your calories should come from rice, bread, vegetables and fruit. You also need to drink a lot of water, 6 to 8 glasses a day. Water helps keep your system clean. Drinking enough water will make your skin better and make you healthy.

Exercise is something that can help to make you look good, feel good and be healthy. Experts suggest that teenagers spend at least 30 minutes exercising, five times a week. That is easy to do! You can walk or ride your bike to school, and do sports at school. However, teenagers often give up sports, saying they have no time left after their studies. In fact, doing exercise can help them sleep better at night and increase their ability to focus on their study.

If you follow the suggestions above, you will look and feel much better and become fit.

小题1: What’s the main idea of this passage?

A.How to eat food.

B.How to exercise.

C.How to lose weight.

D.How to keep fit.小题2:The underlined word “calories” means ________ in this passage.

A.营养

B.能量

C.强壮

D.锻炼小题3:Teenagers spend at least _______ minutes exercising a week according to this passage.

A.150

B.50

C.30

D.5小题4: If you ________, you will become fit.

A.exercise regularly

B.drink lots of water

C.eat rice, bread, vegetables and fruit

D.have a healthy eating habit along with regular exercise小题5:Why do teenagers give up sports in school according to this passage?

Because they _________.

A.are lazy

B.feel great

C.are busy with their studies

D.don’t like sports

单项选择题