问题 单项选择题

对空间电荷抵偿器的叙述,正确的是

A.接在电源电路

B.接在管电流测量电路

C.接在指示灯电路

D.按在机械辅助装置电路

E.接在灯丝电路中

答案

参考答案:E

解析:因X线管中存在空间电荷随着管电压变化而影响mA稳定性,故在灯丝电路内加上空间电荷补偿器。

阅读理解

When newspapers and radio describe the damage caused by a hurricane named Hazel,girls named Hazel are probably teased by their friends.To keep out of trouble,the Weather Bureau says,“Any resemblance between hurricane names and the names of particular girls is purely accidental.”

Some women became angry because hurricanes are given their names,but many other women are proud to see their names make headlines.They don’t even care that they are the names of destructive storms.Because more women seem to like it than dislike it,the Weather Bureau has decided to continue using girl’s names for hurricanes.

In some ways a hurricane is like a person.After it is born,it grows and develops,then becomes old and dies.Each hurricane has a character of its own.Each follows its own path through the world,and people remember it long after it gone.So it is natural to give hurricanes’ names,and to talk about them almost if they were alive.

小题1:What happens to girls named Hazel according to the passage?

A.They suffer from hurricanes.

B.The Weather Bureau look for them.

C.Others often make fun of them.

D.They can’t find boyfriend.小题2:The underlined word“resemblance”probably means ______.

A.trouble

B.difference

C.sameness

D.success小题3:According to the passage,which is more reasonable?

A.Some women feel unhappy because hurricanes are given their names.

B.A lot of women complain of the Weather Bureau.

C.Many women want to be known.

D.All the hurricanes are caused by women.小题4:Public opinions make the Weather Bureau ______.

A.consider the disagreement of some women

B.go on naming hurricanes after women

C.name hurricanes after men

D.look for a new method to name hurricanes

判断题