关于升降浮沉，指出下列错误的是 A．药物作用的定位 B．药物在人体的作用趋向 C．药

阅读理解。

    Do you often play football? Many people in the world like playing football. They often call British football

soccer. But there are differences between them.

    A soccer ball is round (圆形), but an American football is oval (椭圆形), like an egg. Soccer teams have

eleven players on the field. American football teams have forty players, but only eleven players play on the

field at one time. 

    In a soccer team, the goalkeeper (守门员) tries to stop the ball from going into the goal. He is the only

player to stop and pick the ball with hands, while American football players can catch the ball with their hands.

They can catch the ball and throw (投) it to other players. Both British soccer and the American football are

very interesting. They can help us to become strong and clever.

1. British soccer and the American football are ______. [ ]

A. the same

B. different

C. not different

D. only one

2. American football is ______. [ ]

A. oval

B. round

C. not long

D. short

3. A soccer team has ______ players as an American football team is. [ ]

A. the same

B. eleven

C. forty

D. not as many

4. ______ can catch the ball with hands in American football team. [ ]

A. The goalkeeper

B. The coach

C. Some players

D. All the players

5. From the passage we know that ______. [ ]

A. British football is interesting, but American football is not

B. British football players can catch the ball with their hands

C. all the forty players in American football team play in the match at one time

D. Soccer and American football are both good for people's health

孕期营养不良对母亲的影响最常见的是( )。

A．钾缺乏引起的低钾血症

B．铁缺乏引起的缺铁性贫血

C．维生素D和钙缺乏引起的骨质软化症

D．蛋白质或硫胺素缺乏引起的浮肿

E．某些维生素缺乏症

COPD患者每天家庭氧疗时间最恰当的是（）

A.5～10h

B.10～15h

C.10～15h

D.15～20h

E.24h持续

一般自首

宽带系统与基带系统相比有以下哪个优点______。

A．容量大，结构灵活，覆盖范围广

B．需要Modem

C．价格高

D．安装和维护复杂