问题 选择题

化学与生活、社会密切相关,下列说法正确的是

A.合金的许多性能优于其组成成分,如硬度都会增大,熔点都会升高

B.要除去衣服上的顽固污渍,可将衣服泡在漂白液中

C.硅是地壳中含量位居第二的元素,其中玛瑙、光导纤维的主要成分为SiO2

D.工业上获得大量的乙烯、丙烯、丁二烯的方法是石油裂化

答案

答案:C

题目分析:A、合金的熔点比其组成部分的熔点都低,错误;B、漂白液具有腐蚀性,所以不能用漂白液除去衣服上的的顽固污渍,错误;C、地壳中元素的含量由高到低为,氧、硅、铝、铁,所以硅是地壳中含量位居第二的元素,其中玛瑙、光导纤维的主要成分为SiO2,正确;D、工业上获得大量的乙烯、丙烯、丁二烯的方法是石油裂解,错误。

阅读理解

阅读理解。

     If someone asks me, "Do you like music? " I am sure I will answer him or her. "Of course, I do."

Because I think music is an important part of our lives.

     Different people have different ideas about music. For me, I like rock music because it's so exciting.

And my favourite rock band(摇滚乐队), the "Foxy Ladies" is one of the most famous rock bands in

the world. I also like pop music. My classmate Li Lan loves dance music, because she enjoys dancing.

My best friend, Jane, likes jazz music(爵士乐). She thinks jazz is really cool. "I like dance music and

rock very much," says my brother, "because they are amazing." But my mother thinks rock is boring.

"I like some relaxing(轻松的)music." she says, that is why she likes country music(乡村音乐), I think.

1. The writer likes music because he thinks ______.

A. it's an exciting part of our lives      

B. it's an amazing part of our lives

C. it's an important part of our lives    

D. it's an interesting part of our lives

2. What kind of music does the writer like?

A. Jazz and country music.            

B. Rock and dance music.

C. Rock and pop music.              

D. Rock and country music.

3. Who likes dancing?

A. The writer.      

B. Li Lan.      

C. Jane.        

D. The writer's mother.

4. The writer's mother thinks that country music is ______.

A. amazing        

B. boring        

C. relaxing      

D. cool

5. How many people's ideas about music are talked about in this passage?

A. 4.            

B. 5.            

C. 6.          

D. 7.

单项选择题