问题 不定项选择

如图是电子感应加速器的示意图,上、下为电磁铁的两个磁极,磁极之间有一个环形真空室,电子在真空室中做圆周运动。上图为侧视图,下图为真空室的俯视图,电子从电子枪右端逸出(不计初速度),当电磁铁线圈电流的方向与图示方向一致时,使电子在真空室中沿虚线加速击中电子枪左端的靶,下列说法中正确的是

[ ]

A.真空室中磁场方向竖直向上

B.真空室中磁场方向竖直向下

C.电流应逐渐减小

D.电流应逐渐增大

答案

AD

阅读理解

On a Friday night,a poor young violinist was playing his violin at the entrance of the subway station. The music was so great that people slowed down to listen and put some money into his hat.

The next day,the violinist came to the entrance again. He put down his hat as usual. Beside the hat was a piece of paper with some words on it. It said,“A George Sang has put an important thing into my hat by mistake. Welcome to claim(认领)it.”Soon the people were all attracted by the words and wondered what it could be. After a while a man rushed through the crowd,took the violinist’s shoulders and said,“I knew you would certainly come here.”The violinist asked,“Did you lose something?”“Lottery( * * ).”The violinist took out a lottery ticket with Sang’s name on it. Sang took it and danced happily.

Sang was an office worker. He bought the lottery and won a prize of$500,000.But when he gave$50 to the violinist for his wonderful music,the lottery ticket was thrown in, too. The violinist was a college student. That morning,he was going to fly to Vienna for high education. However,when he found the ticket,he cancelled the flight and returned to the entrance.

Later someone asked the violinist why he didn’t take the lottery ticket to pay the tuition fee(学费).He said“Although I don’t have much money,I live happily. If I lose honesty(诚实),I won’t be happy forever.”

小题1:The young man played the violin for ________ at the entrance of the subway station.

A.pleasure

B.money

C.Love

D.friends小题2:George Sang put__________ into the violinist’s hat on a Friday night by mistake.

A.money

B.1ottery

C.money and lottery

D.nothing小题3:George Sang was very__________ to see the young violinist the next day.

A.worried

B.sorry

C.exciting

D.happy小题4:The underlined word“cancelled”means __________ .

A.取消

B.延误

C.预定

D.结束小题5:What’s the best title(标题)for this passage?

A.The meaning of honesty

B.An office worker and a lottery ticket

C.The importance of being honest

D.A violinist and an office worker

单项选择题