问题 问答题 简答题

供水方案的影响因素?

答案

参考答案:

技术因素:供水可靠性,水质对城市给水系统的影响,节水节能效果,操作管理,自动化程度;

经济因素:基建投资,年经常费用,现值等;

社会和环境因素:对建筑立面和城市观瞻的影响,对结构和基础的影响,占地对环境的影响,建设难度和建设周期,抗旱防冻性能,分期建设的灵活性,对使用带来的影响等。

阅读理解

阅读理解。

     Spending just a few hours a week online may make people feel more socially isolated(孤立的),

lonely and downhearted(沮丧的), according to a two-year study of nearly 100 families with the

Internet.

     "We were surprised to find that social technology has such bad effects on social communications,"

the lead author, Dr. Robert Kraut of Carnegie Mellon University in Pittsburgh, Pennsylvania, said in a

statement to the news. The findings suggest that "Rather than encourage students to use the Internet

alone for research, teachers might give pupils online group homework to complete with classmates.

Local groups might build websites that allow neighbors to discuss local affairs(地方事务)."

     "Before the technology develops and can be really more beneficial, people should control(控制)

their wishes to use much of the Internet," Dr. Kraut and other experts advise. In order to control their

children and encourage family activities, parents might think of putting the computer in the living room

rather than in a child's room, they suggest.

     Dr. Kraut also suggests that when surfing on the net, especially when chatting with strangers on the

net, children should not use their real names, and that they should not tell the addresses, telephone

numbers to the strangers.

1. According to the research, surfing on the Internet can make people feel more            .

A. excited              

B. communicative

C. lonely                

D. happy

2. This study was made by            .

A. 100 families

B. Dr. Kraut and other experts

C. the newspaper

D. Dr. Kraut only

3. This research work took          .

A. a week          

B. a few hours

C. two years        

D. more than 100 days

4. According to the context(上下文), "beneficial" means "            " in Chinese.

A. 有害的        

B. 发展的

C. 有趣的        

D. 有益的

5. Which of the following do the experts suggest?

A. Teachers should ask the students to finish their homework alone on the Internet.

B. Schools should build websites for students to discuss problems on the Internet.

C. Instead of putting the computer in the sitting room, parents should put it in a child's room.

D. Children should not give their real names, addresses or telephone numbers to the strangers.

解答题