问题 选择题

如图所示,闭合电键S,两灯均不亮。若电路中只有一处故障,且只发生在灯L1或L2上。现用一根导线并接在L1的两端,两灯仍不亮。正确的判断是            (    )

A.灯L1断路

B.灯L1短路

C.灯L2断路

D.灯L2短路

答案

答案:C

A 如果灯L1断路,L2正常,将导线并接在L1两端时,L2会发光.此选项不符合题意;B 如果灯L1短路,则L2会发光.此选项不符合题意;C 如果灯L2断路,L1正常,将导线并接在L1两端时,电路仍为断路,所以两灯仍不亮.此选项符合题意;

D 如果灯L2短路,则L1会发光.此选项不符合题意.故选C.

阅读理解

An old man died and left his son a lot of money. But the son was a foolish young man, and he quickly spent all the money, so that soon he had nothing left. Of course, when that happened, all his friends left him. When he was quite poor and alone, he went to see Nasreddin, who was a kind, clever old man and often helped people when they had troubles.

My money has finished and my friends have gone, said the young man. What will happen to me now?

Don't worry , young man, answered Nasreddin. Everything will soon be all right again. Wait ,and you will soon feel much happier.

The young man was very glad .Am I going to get rich again then? he asked Nasreddin.

No, I didn't mean that, said the old man. I meant that you would soon get used to being poor and to having no friends.

小题1:An old man died and left his son_______.

A.nothing

B.some gold

C.much money

D.only a house小题2:When the son was________, he went to see Nasreddin.

A.short of money

B.quite poor and sick

C.in trouble

D.quite poor and alone小题3:The young man was very glad because Nasreddin said that________.

A.he would become rich again

B.he would soon feel much happier

C.he would become clever

D.he would have more friends小题4:Nasreddin meant the young man______.

A.would get rich again

B.would get used to having nothing

C.would get used to being in trouble

D.would get out of poorness小题5:What this story tells us is________.

A.that money is everything

B.that money makes the mare go

C.to save each penny

D.that misfortune tests the sincerity of friends

填空题