问题 单项选择题

有人对“不到长城非好汉”这句名言的理解是:“如果不到长城,就不是好汉。”假定这种理解为真,则下列哪项判断必然为真()?

A.到了长城的人就一定是好汉

B.如果是好汉,他一定到过长城

C.只有好汉。才到过长城

D.不到长城。也会是好汉

答案

参考答案:B

解析:

B。解析:考查充分条件的假言推理。“如果不到长城,就不是好汉”为真,根据充分条件假言推理规则否定后件则否定前件,可以推出“如果是好汉,一定到过长城”,所以B项符合题意。A项属于无效推理形式,C项混淆了充分条件与必要条件。D项为错误的推理。因此答案为B。

阅读理解

MySpace, the social networking website, is different from other websites which only provide stories about other people. MySpace is a place that allows you to broadcast your own stories and personal information to as many people as you like. Started two years ago, it is a big source of information for and about American kids.

Teenagers and their parents feel very differently about it. Teens are rushing to join the site, not sharing their parents' worries. It signals yet another generation gap in the digital era.(数字时代)

For teenagers, it is reliable network to keep in touch with their friends. They will often list their surnames, birthdays, after­school jobs, school clubs, hobbies and other personal information.

“MySpace is an easy way to reach just about everyone. I don't have all the phone numbers of all my acquaintances (熟人). But if I want to get in touch with one of them, I could just leave them a message on MySpace.” said Abby Van Wassen. She is a sixteen ­year­ old student at Woodland Hills High of Pittsburgh, Pennsylvania.

Parents on the other hand are seriously concerned about the security problems of MySpace.

“Every time we hold a parents meeting, the first question is always about MySpace,” said Kent Gates, who travels the country doing Internet safety seminars (研讨会).The National Center for Missing and Exploited Children has received at least 288 MySpace­ related complaints, according to Mary Beth Buchanan, a lawyer in Pittsburgh.

“Your profile on MySpace shows all your personal information to anyone on the Web. And MySpace even lists this information by birthplace and age. It's like a free checklist(清单)for troublemakers and it endangers children,” Buchanan said.

小题1:From the passage we can learn that MySpace ________.

A.brings about the generation gap

B.is very careful about people's privacy

C.encourages you to list your personal information

D.lists the telephone numbers of your friends小题2:Why are some parents against MySpace?

A.Because MySpace has a bad influence on their children.

B.Because they don't want to pay so much money for MySpace.

C.Because it takes up too much of their children's spare time.

D.Because troublemakers can easily approach their children through the site.小题3:The writer's attitude towards MySpace is ________.

A.negative

B.positive

C.optimistic

D.objective小题4:Which of the following can be the best title of the passage?

A.Internet safety

B.MySpace

C.Generation gap

D.The digital era

判断题