旋转防喷器胶芯旋转是通过其内部液压系统来驱动的。（）

阅读理解。

     Sigmund Freud was a world-famous doctor of Vienna (维也纳). He was also a man full of humour

(幽默). Once, at his 70th birthday party, a friend asked Freud if he could put his work into several words.

"Well," said Freud,"we take the sick out of their trouble and return them to the common suffering."

     As a devoted (忠实的) son, Freud often visited his old mother. His mother usually spent her summers in

a small mountain town in Austria (奥地利). The King Josef usually spent his summers there, too. One day in

the summer, a band (乐队) was playing a lively tune (曲子) when Freud's mother was sitting at the window

and watching the people singing and dancing on Main Street. The old woman had a poor memory. She heard

the band playing, but forgot it was the King's birthday. Freud was visiting his mother on her 95th birthday. He

told his mother,"Mama, the band is playing for your birthday." She believed him and had a wonderful day.

1. Freud was a famous of ________.

A. doctor, Austria

B. general, Vienna

C. King, Austria

D. doctor, Australia

2. One day Freud came to the small mountain town for ________.

A. his 70th birthday

B. the King Josef's birthday

C. his mother's birthday

D. his holiday

3. Freud's mother felt very happy on her 95th birthday because ________.

A. the King Josef himself came to celebrate (庆贺) her birthday

B. the people of the town came out to celebrate her birthday

C. she believed that the band was playing for her birthday

D. she heard the band playing a lively tune so wonderfully

a的相反数是[ ]

A．﹣a

B．a

C．|a|

D．不能确定

患者，女，30岁。心悸、气促2个月，咯粉红色泡沫痰。检查：面颊暗红，口绀，双肺底闻及湿啰音．心尖区闻及舒张期隆隆样杂音，下肢浮肿。应首先考虑的是（）

A.肺源性心脏病

B.冠心病

C.二尖瓣狭窄，心功能不全

D.高血压心脏病

E.心包积液

苯乙烯的结构为，该物质在一定条件下能和氢气完全加成，加成产物的一溴取代物有[ ]

A．7种

B．6种

C．5种

D．4种

社团会费最高标准：新会员（）元/人。

A.5

B.10

C.15

D.20