问题 选择题

组成和结构可用表示的有机物中,能发生消去反应的共有

A.10种

B.20种

C.30种

D.40种

答案

题目分析:苯环前面的取代基有六种同分异构体,但只有四种能发生取代反应,右边的有五种同分异构体,因此总共有二十种,选B。

阅读理解

Many people like to search the Internet. Exploring the Internet is one of the most important activities of the day. The Internet brings the outside world closer to people’s homes. Some people say the world is smaller than before because of the Internet.

What’s going on in other countries? How do people live in places far away? Is there a good sports game somewhere? What’s the life like in the deepest part of sea? If you want to answer all these questions, just come to the Internet. Of course, people can also learn through reading or listening to the radio. But with the Internet they can learn better and more easily. A lot of information can be collected at a great speed.

Can we go shopping without leaving home? Can we see a doctor without going to the hospital? Can we study without going to school? Can we draw money without going to bank? All these things seemed to be impossible, but now they have become quite possible.

The Internet helps us open our eyes. The Internet also helps open our minds. The Internet often gives us new ideas. In a word, it helps us in many ways. Great changes have taken place in our life since the appearance of the Internet.

小题1:Some people say the world is smaller than before because_________.

A.all people like to search the Internet

B.the Internet makes the search smaller in size

C.the Internet brings the outside world closer to them

D.exploring the Internet is one of the most important activities of the day小题2:The sentence “The Internet also helps us open our minds.” means_____ .

A.the Internet is new to us

B.something is wrong with our minds

C.our minds can be opened only by the Internet

D.we can learn more with the help of the Internet小题3:We can’t _________ through the Internet.

A.know a good sports match somewhere

B.cook the meal

C.know a lot of information

D.see a doctor and study all kinds of subjects小题4:This passage has told us _________ .

A.it’s helpful to explore the Internet

B.not to explore the Internet any more

C.to stop reading to explore the Internet

D.students should not explore the Internet at any time小题5:Which of the following sentences is not true?

A.The Internet can get the information faster than reading.

B.Without leaving home, we can get the money from the bank by radio.

C.People can learn better and more through the Internet.

D.People often learn a lot of new ideas from the Internet.

单项选择题