| The air surrounding us is important to
everyone. Without air, we could not exist. Everyone understands that. But air is
necessary in many other ways — ways that are not always so obvious or widely
known. If we did not have air, there would be no sound. Sound travels through air. Where there is no air, there is no sound. Without air there would be no fire. There would be no automobiles, since motors need air in order to operate. Without air, there would be no wind or clouds. The night time would be very cold and the days very hot. We would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun’s deadly rays. In this huge ocean of air surrounding the earth, there is more energy than in all the coal, oil and gas we have on the earth. Electrical energy is collected in the at A. for hundreds of years B. for several years C. recently D. for thousands of years [单选题]某变电站35kVXX线XX开关电流互感器计量和保护CT变比均为400/5，某日该线路所带负荷电流达到440A，该线路开关电流互感器过负荷倍数为(____)。
A.1 B.1.05 C.1.1 D.1.2 标准 [单选题]变电站一级动火工作票的有效期为（）h。
A.24 B.36 C.48 D.60 E.略 F.略 [单选题]排水管道检查井内部发生破裂、（ ）等缺陷时，应采用嵌补法、现场固化内衬、涂层内衬等方法修理。
A. 异物侵入 B. 渗漏 C. 异管穿入 D. 破裂 [判断题]电工应做好用电人员在特殊场所作业的监护作业。:
A.正确 B.错误 [单项选择] {{B}}Section A{{/B}} There is one passage in this section followed by five questions. For each question, there are four choices marked A, B, C and D. You should decide on the best choice, then mark the corresponding letter on the answer sheet with a single line through the centre.
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