试题与答案

计算题:某独立电网中的火电厂某月发电量10万kW·h,厂用电电量占4%。独立电网内另

题型:问答题 简答题

题目:

计算题:某独立电网中的火电厂某月发电量10万kW·h,厂用电电量占4%。独立电网内另有一座上网水电站,购电关口表当月电量为1.5万kW·h。另该电网按约定向另一供电区输出电量3.7万kW·h。该电网当月售电量为6.9万kW·h,问独立电网当月线损率为多少?

答案:

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参考答案:A

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题型:阅读理解

阅读理解。

     Zach Linsky, 11, watches TV for 3 and a half hours a day and plays video games every other day.

 Zach, a sixth grader in Washington, D. C., is an American. But unlike many kids, he doesn't have a TV,

 VCR, or computer in his bedroom. He only has a boom box (手提录音机).

     The survey of 3,155 kids, aged 2 to 18, shows that they spend 5 hours and 29 minutes on average (平

 均的) a day using some types of media outside of school, including 2 hours and 46 minutes watching TV,

  21 minutes on the computer, 20 minutes playing video games, and 8 minutes on the Internet. The good

 news: The total includes 44 minutes spent reading.

     The survey also shows that those aged 2 to 7 spend 3 hours and 9 minutes watching TV every day and

  shows that 32 percent in that age group have TV sets in their rooms. Among those aged 8 to 18, 21

 percent have computers in their rooms, 65 percent have TV sets, and 61 percent say their parents don't

 stop them from watching TV. Nearly 1 in 4 say they watch more than 5 hours a day.

     "Kids are living much more lonely lives than ever before," says Kay S. Hytnowitz. "They just

 disappear into their rooms and spend all of their time with these media."

1. At what age do children in America spend about five and a half hours on the media a day?

     A. Aged 2 to 7.

     B. Aged 2 to 18.        

    C. Aged 8 to 18.        

    D. Aged 2 to 11.

2. How long do kids aged 2 to 18 spend reading?

    A. 46 minutes.      

    B. 21 minutes.          

    C. 20 minutes.      

    D. 44 minutes.

3. How many kids aged 2 to 7 have TV sets in their rooms?

    A. 32%.            

    B. 21%.              

    C. 61%.          

    D. 40%.

4. Why do the children spend all of their time with these media? Because _____.

    A. they have too much free time    

    B. they feel very lonely

    C. they like these media          

    D. they want to find out something

5. What's the problem of the kids in America according to the passage?

    A. There are too many media now.

    B. Kids spend too much time on the media.

    C. Kids are too fat.

    D. Kids would rather be with friends than the TV.

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