问题 单项选择题

预防计算机病毒传染,用户采取的措施不正确的是()。

A、尽量不使用外来存储设备,必须使用时要进行病毒检测

B、不要更新系统补丁和各种软件,以免出现漏洞,给病毒可乘之机

C、对重要的软件和数据定时备份,以便在发生病毒感染而遭到破坏时,可以恢复系统

D、使用网络下载的软件,应先确认其不带病毒,可用防病毒软件检查

答案

参考答案:B

填空题
阅读理解

阅读理解

     Too much TVwatching can harm children's ability to learn and even reduce their chances of getting

a college degree, new studies suggest in the latest effort to examine the effects of television on children.

     One of the studies looked at nearly 400 northern California thirdgraders. Those with TVs in their

bedrooms scored about eight points lower on math and language arts tests than children without

bedroom TVs.

     A second study, looking at nearly 1, 000 grownups in New Zealand, found lower education levels

among 26yearolds who had watched lots of TV during childhood. But the results don't prove that TV

is the cause and don't rule out that already poorly motivated youngsters (年轻人) may watch lots of TV.

     Their study measured the TV habits of 26yearolds between ages 5 and 15. Those with college

degrees had watched an average of less than two hours of TV per weeknight during childhood,

compared with an average of more than 2 hours for those who had no education beyond high school.

     In the California study, children with TVs in their rooms but no computer at home scored the lowest,

while those with no bedroom TV but who had home computers scored the highest.

     While this study does not prove that bedroom TV sets caused the lower scores, it adds to

accumulating findings that children shouldn't have TVs in their bedrooms.

1. According to the California study, the lowscoring group might ________.

A. have watched a lot of TV

B. not be interested in math

C. be unable to go to college

D. have had computers in their bedrooms

2. What is the researchers' understanding of the New Zealand study results?

A. Poorly motivated 26yearolds watch more TV.

B. Habits of TV watching reduce learning interest.

C. TV watching leads to lower education levels of the 15yearolds.

D. The connection between TV and education levels is difficult to explain.

3. What can we learn from the last two paragraphs?

A. More time should be spent on computers.

B. Children should be forbidden from watching TV.

C. TV sets shouldn't be allowed in children's bedrooms.

D. Further studies on highachieving students should be done.

4. What would be the best title for this text?

A. Computers or Television

B. Effects of Television on Children

C. Studies on TV and College Education

D. Television and Children's Learning Habits