问题 单项选择题

根据联合国艾滋病规划署公布的最新统计数字,截至2005年底,全球估计共有3860万名艾滋病病毒感染者,其中女性达1750万,15岁以下的儿童230万。统计还发现,2005年全球新增艾滋病病毒感染者410万,另有280万人死于艾滋病。撒哈拉以南的非洲地区仍是艾滋病病毒感染者最多的地区。这一地区的人口只占全球人口的10%左右,但集中了全球60%的艾滋病病毒感染者。此外,拉美地区也是目前受艾滋病影响最严重的地区之一。截至2005年底,该地区的艾滋病病毒感染者总数为200万,成人艾滋病病毒感染率达1.6%。2005年底,整个亚洲的艾滋病病毒感染者总数为830万,其中新增感染者110万。10年前,全球大约每10名艾滋病病毒感染者中有1名在亚洲地区,现在这一比例已经上升到5比1。东欧和中亚地区是艾滋病病毒感染者增加最快的地区,2005年的感染人数比2003年度增加了1/4,死于艾滋病的人数增加了1倍。

2005年底,整个亚洲的新增艾滋病感染者占全球新增感染者的比例是( )。

A.10%

B.20%

C.25%

D.27%

答案

参考答案:D

解析: 2005年底,整个亚洲新增艾滋病感染者110万人,全球新增艾滋病感染者410万人,所占比例是:110÷410×100%≈27%,本题选D。

单项选择题

How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the US.

For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as dangers and with good guides, some education, and a few precautions, the wilds of the Internet can be safely navigated. "Kids have to be on-line. If we tell our kids they can’t have access to the Internet, we’re cutting them off from their future, " said an expert.

Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way to limit access would be to use what is known as a "content screener". But this can’t be wholly reliable, and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing the Internet.

A few other tips

·Don’t put the PC in a child’s room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.

·Ask your child what he or she has been doing and about any friends they make on-line.

·Tell your child not to give on-line strangers personal information, especially like address and phone number.

·And tell your children never to talk to anyone they meet on-line over the phone, send them anything, accept anything from them or agree to meet with them unless you go along.

According to the passage, we can infer that()

A. soft wares fit for children want programming

B. a child who is on-line is in danger

C. Internet is a jungle full of danger

D. Internet contains a lot of harmful sites

单项选择题