问题 选择题

如图所示,三个相同的灯泡a、b、c和电阻不计线圈L与内阻不计电源连接,下列判断正确的有                       (   )

A.K闭合的瞬间,b、c两灯亮度不同

B.K闭合的瞬间,a灯最亮

C.K断开的瞬间,a、c两灯立即熄灭

D.K断开之后,a、c两灯逐渐变暗且亮度相同

答案

BD

单项选择题
阅读理解

阅读理解。

     A typical Chinese Internet user is a young male who prefers instant messaging to e-mail, seldom makes

online purchases and favors news, music and games sites. According to a study, about two-thirds of survey

participants use the Internet for news-often entertainment-related-or for online games. About half download

music and movies.

     They also tend to prefer instant messaging to e-mail, and they are depending on the Intemet more frequently

than before to communicate with others who have the same professions, hobbies and political interests. Online

purchases still remain unpopular in China. Three-quarters of users surveyed have never bought anything over

the Intemet, and only 10 percent make purchases even once a month. Among those who do buy online, most

pay for entertainment while others buy phone cards, or computer hardware or software.

     "Many people don't trust the quality of goods bought online," Guo said Wednesday. "If they buy it in a store

and don't like it, they can easily bring it back."

     The survey was done in five major cities: Beijing, Shanghai, Guangzhou, Chengdu and Changsha. Results do

not necessarily project countrywide because Internet use in rural areas is lower than in cities. Guo describes the

typical netizen in the five cities surveyed as young, male, richer and more highly educated. Males make up two-

thirds of the Internet community, and more than 80 percent of users are under 24. Among people ages 25 to 29,

60 percent to 80 percent go online. China has more than 100 million people online, second in the world to the

United States.

1. A typical Chinese Intemet user will be the one who _____. [ ]

A. likes to send e-mails

B. likes to buy goods online

C. likes to pay for entertainment

D. likes the games sites

2. Online purchases still remain unpopular in China mainly because _____. [ ]

A. it is more difficult for sales retums

B. people haven't computers

C. people can't have a look at the goods

D. goods bought online are of low quality

3. Which of the following words fails to describe the typical netizens in the five cities?[ ]

A. Well educated.

B. Richer.

C. Female.

D. Young.