离心泵启动前出口阀应处于（）位置。

鼻窦体位引流法是使用吸引器具，使鼻窦形成负压，以利于向鼻内滴入的药液停留在鼻窦内，达到治疗鼻窦炎目的的一种方法。（）

We each have a memory（记忆力）. That’s why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart, but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.

A good memory is a great help in learning a language. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and then he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages as easily as one because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language because the pupils have so little time for it, and they are busy with other subjects, too.

But your memory will become better and better when you do more and more exercises.

小题1:、Some people can easily learn many things by heart because                .

A．they always sleep very well

B．they often eat good food

C．they read a lot of books

D．they have very good memories小题2:.、Everybody learns his mother language         .

A．at the age of six

B．when he is a small child

C．after he goes to school

D．when he can read and write小题3:.、Before a child can speak, he must              .

A．read and write

B．make sentences

C．hear and remember the sounds

D．think hard小题4:.、In school the pupils can’t learn a foreign language well because          .

A．they have no good memories

B．they have no recorders

C．they have too much time for it

D．they are busy with other subjects小题5:.、Your memory will become better and better          .

A．if you have plenty of good food

B．if you do more and more exercises

C．if you do morning exercises every day

D．if you get up early

复元活血汤1功效与作用

犯罪预备、未遂、中止三者的相同点有( )。

A．存在于故意犯罪过程中

B．存在于以危害结果作为犯罪构成要件的直接故意犯罪中

C．具有一定程度的社会危害性

D．具有应受刑罚惩罚性

组织中最主要、最活跃的生产力要素是______

A．内部公众
B．首要公众
C．外部公众
D．次要公众