当气体压力不变时，温度与比体积成（）。 A.反比 B.正比 C.不变 D.没有关系

太空：卫星（）

A．铁轨：火车

B．公路：自行车

C．机场：直升飞机

D．城市：公共汽车

阅读理解。

     Mary is reading something about how to keep healthy on the Internet.

     Good sleep is important for your health. You need about eight hours’ sleep a night. Don’t eat or read in bed. A cup of milk before sleeping may help you get a good sleep. Go to bed before 10:00 and get up early every morning. For more information, please visit www. sleeping. com.

     How often do you exercise? If you want to stay healthy, you should do a lot of exercise. Try to exercise for 30 minutes a day, three or four times a week. For more information, please call Health Line at 180-2000.

      Studies show that the cold or flu virus(流感病毒) can live on our hands for long. So you should wash your hands often with soap and water. If you want to know more, please call Health Line at 180-1313.

Brush your teeth twice a day. And see a dentist at least (至少) once a year. The oral examination(口腔检查) is not only for the health of teeth, but the whole body. Please visit www. mydr. com for more information.      

1. If you want to get a good sleep, you should             before sleeping.         

A. stay up

B. read in bed

C. drink some milk

D. eat something

2. You should do exercise              to keep healthy.

A. many hours every day

B. ten minutes every day

C. 30 minutes a week

D. about 2 hours a week

3. To prevent from catching a cold or flu, it’s good for you            .       

A. to wash your hands often

B. to brush your teeth twice a day

C. to get up early every morning

D. to eat some healthy food

4. You should visit the dentist at least once a year, because            .        

A. you don’t often brush your teeth

B. the oral examination is necessary

C. it is good for the dentists

D. it can only keep your teeth healthy

5. If you want to learn more about flu, you can             .       

A. visit www. sleeping. com.

B. call Health Line at 180-2000

C. call Health Line at 180-1313

D. visit www. mydr. com

关于狭颅症头颅畸形，如所有颅缝均早闭，则形成短头畸形。()

《烟花爆竹安全管理条例》规定，危险品仓库地面应当铺设木地板，无地板的仓库，地面要设置( )cm高的垛架，铺以防潮材料。

A．10
B．20
C．30
D．40

2010年省公司定义的高损台区线损指标是（）。

A.高于30%

B.高于25%

C.高于20%