问题 问答题 简答题

操作井下电气设备,必须遵守那些规定?

答案

参考答案:

(1)不得带电检修、搬迁电气设备;

(2)非专职或值班电气人员,不得擅自操作电气设备;

(3)操作高压电气设备主回路时,操作人员必须戴绝缘手套,并必须穿电工绝缘靴或站在绝缘台上;

(4)操作千伏级电气设备主回路时,操作人员必须戴绝缘手套或穿电工绝缘靴;

(5)127伏手持式电气设备的操作手柄和工作中必须接触的部分,应有良好绝缘。

完形填空

A land free from destruction, plus wealth, natural resources, and labor supply—all these were important 1 in helping England to become the center for the Industrial Revolution. 2 they were not enough. Something 3 was needed to start the industrial process. That "something special" was men—4 individuals who could invent machines, find new 5 of power, and establish business organizations to reshape society.

  The men who 6 the machines of the Industrial Revolution 7 from many backgrounds and many occupations. Many of them were 8 inventors than scientists. A man who is a 9 scientist is primarily interested in doing his research 10 .He is not necessarily working 11 that his findings can be used.

  An inventor or one interested in applied science is 12 trying to make something that has a concrete use. He may try to solve a problem by 13 the theories 14 science or by experimenting through trial and error. Regardless of his method, he is working to obtain a 15 result: the construction of a harvesting machine, the burning of a light bulb, or one of 16 other objectives.

  Most of the people who 17 the machines of the Industrial Revolution were inventors, not trained scientists. A few were both scientists and inventors. Even those who had 18 or no training in science might not have made their inventions 19 a groundwork had not been laid by scientists years 20 .

  1.A.cases      B .reasons            C .factors           D .situations

  2.A.But        B .And             C .Besides          D .Even

  3.A.else       B .near               C .extra            D .similar

  4.A.generating  B .effective          C .motivating        D .creative

  5.A.origins      B .sources          C .bases             D .discoveries

  6.A.employed   B .created            C .operated          D .controlled

  7.A.came       B .arrived            C .stemmed         D .appeared

  8.A.less       B .better             C. more            D .worse

  9.A.genuine     B .practical           C .pure            D .clever

  10.A.happily    B .occasionally        C. reluctantly        D .accurately

  11.A.now      B .and                C .all              D .so

  12.A.seldom    B .sometimes         C .all                D .never

  13.A.planning  B .using              C .idea               D .means

  14.A.of       B .with              C .to                 D .as

  15.A.single     B .sole              C. specialized         D .specific

  16.A.few      B .those              C .many              D .all

  17.A.proposed  B .developed         C .supplied           D .offered

  18.A.little      B .much             C .some             D .any

  19.A.as        B .if               C .because           D .while

  20.A.ago      B .past               C .ahead              D .before

问答题 简答题