问题 单项选择题

下列哪一说法是正确的()

A.X线波长短,具有很强的穿透力,能穿透一切可见光不能穿透的物质

B.X线激发荧光物质,使波长短的X线转变成波长长的可见荧光

C.经X线照射后,感光的溴化银中的银离子被氧化而析出金属银

D.X线的生物效应是指人体对X线有一定的耐受性

E.通过测量空气的电离程度可计算出X线的波长

答案

参考答案:B

解析:X线波长短,具有很强的穿透力,能穿透可见光不能穿透的物质,具有穿透性;X线激发荧光物质,使波长短的X线转变成波长长的可见荧光,这种转换叫做荧光效应;经X线照后,感光的溴化银中的银离子被还原而析出金属银;X线的生物效应是指X线对人体有一定生物学方面的改变。

阅读理解

Date of birth: July 26. 1985        Weight: 50 kg

Place of birth: Changsha, Hunan    Favorite city: Paris

Height:164 cm                  Hobby: music

Type of blood: AB

Zhou Bichang was the winner of the Super Girls. She did

quite well in her studies and got a high score of 681 in her NCEE in 2003.

Zhou Bichang graduated from Futian High School in Shenzhen and is now a student at the Xinghai Conservatory of Music(音乐学院) in Guangzhou.

Although her parents gave her a name with the meaning "write excellently" in the hope that she would become a writer. Zhou seems to be a born singer. She could sing theme songs of TV shows very well when she was only two years old. She has more than 4,500CDs.

Zhou has been well-known across the country during the contest. Fans gave her a nickname "BB" and themselves a title "Chalks". However, BB doesn’t seem to enjoy the sudden success. Now she is back to school but feels a bit uneasy when fans see her. "What I really love is singing," said BB in an interview, "but not the life of a star," But that’s exactly why "Chalks" love "BB".

小题1:Zhou Bichang is called ______ by her fans.

A.Chalks

B.BB

C.Write fluently

D.Bichang小题2:What do Zhou Bichang’s parents want her to be in the future?

A.A writer.

B.A pop singer

C.A film star.

D.We don’t know.小题3:What’s the meaning of the underlined word "uneasy"?

A.nervous

B.worried

C.excited

D.uncomfortable小题4:What do you think Zhou Bichang can do well in from this passage?

A.Only her study.

B.Only singing.

C.Both her study and singing.

D.Her study, singing and writing

填空题