1965年4月至1998年6月33年中、国际通信卫星发展了8代、共发射多少颗卫星（）

阅读理解

Mary has a room. It’s a big and nice room. It’s bright and clean (明亮清洁的). There are some pictures on the front wall. On the back wall there is a map of China.

There is a desk and a chair in her room. Her backpack is behind the chair. Some books and her pencil-case are on the desk. There are some color pencils, a pen, a ruler, and a knife in the pencil-case. Mary’s bed is near the desk. Her shoes and a volleyball are under the bed.

Mary and her friends are often in her room. They usually listen to music there. Mary likes English and Chinese very much. But she doesn’t like math. It’s to difficult for her. Mary’s Chinese teacher is Mr. Wang. The students all love him, he is very strict, but sometimes very funny.

小题1:Mary’s room is __________________________.

A．too small

B．big and nice

C．bright and clean

D．both B and C小题2: The volleyball is _______________________.

A．on the desk

B．on the wall

C．under the bed

D．behind the chair小题3: Mary likes ______________________________.

A．playing the guitar

B．playing soccer

C．going to movies

D．listening to music小题4:Mr. Wang------- ______________________________.

A．is an English teacher

B．is busy and strict

C．doesn’t like his students

D．is Mary’s Chinese teacher小题5: Which is right(正确的)?

A．There is a map of China on the front wall

B．Mary’s backpack and books are on the desk

C．English and Chinese are Mary’s favorite subjects（最喜欢的科目）

D．Mary doesn’t like her Chinese teacher

辅酶和辅基的差别在于

A．辅酶为小分子有机物，辅基常为无机物

B．辅酶与酶共价结合，辅基则不是

C．经透析方法可使辅酶与酶蛋白分离，辅基则不能

D．辅酶参与酶反应，辅基则不参与

E．辅酶含有维生素成分，辅基则不含

如图所示，小明举起锤子，然后让木柄撞击在扳凳上，使松动的锤头套紧，这是利用了

A.锤头的惯性

B.锤头的重力

C.木柄的惯性

D.木柄的重力

短信通业务选择包月计费时，取消签约的（）可以重新签约。

A.次日

B.次月

C.三日后

D.当日

下面哪个罗盘的工作不受地磁的影响（）？

A.陀螺半罗盘

B.磁条式磁罗盘

C.感应式磁罗盘