Service有哪两种基本用途？

_______ the secret of nature, the young scientist has little time for entertainment.

A．Devoted to bring out

B．Devoted himself to bringing out

C．Devoted to bringing out

D．Devoting to bring out

In the USA, many rich people __________most of their money to the charity?[ ]

A. give off      

B. give out    

C. give up      

D. give away

世界上第一台计算机诞生于哪一年

A．1945年

B．1956年

C．1935年

D．1946年

句型转换。

1. It was rainy yesterday.(就划线部分提问)

_________ _________ _________ _________ yesterday?

2. He bought me a very nice picture.(就划线部分提问)

_________ _________ he _________ _________ you?

3. It usually takes me half an hour to get to school by bus everyday.(就划线部分提问)

________ _______ _______ it usually _______ _______ to get to school by bus everyday?

4. He rides to work everyday.(不失原意改写)

He _________ _________ _________ _________ _________.

5. It took him two hours to do his homework last night.(不失原意改写)

_________ _________ hours _________ his homework last night.

6.He did his best to help the poor.(改为一般疑问句)

_________ he _________ his best to help the poor?

7. Jack lives five miles from his office.(就划线部分提问)

_________ _________ _________ jack _________ from his office?

8.You mustn't run in the hallways(不失原意改写)

_________ _________ in the hallways

9. Mike goes back home to see his parents twice a month.(就划线部分提问)

_________ _________ _________ Mike_________ back to see his parents?

10. _________ _________ _________ _________ last week? (根据答语写出问句)

I visited an old friend of mine.

房颤听诊的特征有（）

A.颈静脉搏动A波消失

B.心律绝对不齐

C.心音强弱不等

D.心率快时可发生脉搏短绌

E.左心房扩大