问题 问答题

一个正确的停电措施应注意做到哪些

答案

参考答案:拟订一个正确的停电措施并认真执行,是防止发生触电事故的一个极为重要的环节。一个正确的停电措施应注意做到以下各点。
(1)将被检修设备可靠地脱离电源,也就是必须正确地将有可能给被检修设备送电或向被检修设备反送电的各方面电源断开。
(2)断开电源,拉开至少一个有明显断开点的开关。
(3)停电操作时,必须先停负荷,再拉开关,最后拉开隔离开关。严禁带负荷拉隔离开关。
(4)邻近带电设备的工作人员在进行工作时,应与带电部分保持安全距离,在无遮栏对低压系统应不小于0.1m时,对10kV系统应不小于0.7m。
对线路工作来说,还应将有可能危及该线路停电作业,且不能采取安全措施的交叉跨越、平行和同杆架设线路同时进行停电;对大接地短路电流系统、同杆架设线路和两相线加一接地线同杆架设线路,当某一回路停电时,其他回路一般应同时停电。

阅读理解

The artist Grandma Moses became famous for her simple, bright, cheerful paintings of American farm life.Her full name was Anna Mary Robertson Moses.But she was known to everyone as Grandma Moses because she did not begin to paint seriously until in her seventies.

Born on a farm in New York, Anna had little schooling.Her days were filled with farm chores.But she often found time to make pictures.Soon, however, she became too busy to draw or paint.At the age of 12, she went to work as a servant for a family nearby.She worked for other people for many years.Then, when she was 27, she married Thomas Moses, a farmer.And they began raising a family of their own.

Anna Moses could no longer do heavy farm work with age.Then, in her seventies, she began to paint in oils.Her pictures showed things she recalled from childhood-farm scenes, ice-skating, bringing home the Christmas tree.Later, she began to display her art at county fairs.Her pictures recorded a way of life that was quickly passing away.People everywhere loved these happy scenes, and soon her paintings were shown in art galleries.Grandma Moses became famous partially on account of her age, but mainly because her approach to art was modest and simple compared to many other painters of her time.Without formal training or even knowledge of Modernism, she relied on her own simple techniques to create her landscapes and scenes.She continued to paint almost until her death, on December 13, 1961 , at the age of 101.

The themes in her paintings provided the comfort of a rural life that many busy Americans treasured from their past.The threat of nuclear arms that appeared on television screens and in magazines had Americans starving for something more.Grandma Moses' art appealed to those who had lost hope for the future.Her classic paintings still appear on TV commercials, greeting cards, and magazine and book covers.

小题1:What can be inferred from the fact that Grandma Moses picked up a paintbrush?

A.She had no other ways to kill time.

B.Her friend and family suggested it.

C.She had had a love for painting since her childhood.

D.She needed to make a living by selling her paintings.小题2:The key reason for her success is ___  .

A.her old age

B.her plain style

C.her lack of training

D.her modern knowledge小题3:We can know from the passage that ______.

A.her paintings raised people's hope for the future

B.her paintings expressed the reality of her old age

C.many Americans were interested in purchasing art works

D.people wanted to get comfort by remembering grandmas

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