问题
问答题 简答题
线路短路引起火灾的原因是什么？
答案
参考答案：
线路短路时由于短路电流的热效应使得温度急剧升高，从而引起绝缘材料燃烧，使线路附近的易燃物燃烧着火。
发生短路引起火灾的主要原因有：线路安装不正确；对运行线路未能及时发现缺陷；使用不正确。
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线路短路引起火灾的原因是什么？
参考答案：
线路短路时由于短路电流的热效应使得温度急剧升高，从而引起绝缘材料燃烧，使线路附近的易燃物燃烧着火。
发生短路引起火灾的主要原因有：线路安装不正确；对运行线路未能及时发现缺陷；使用不正确。
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| John was so lazy that he stayed home and watched television all day instead of working. One day his 1 saw a "Help wanted" ad in the supermarket window. The supermarket needed 2 to put things on the shelves. She told the manager that her husband didn't have a job but he was very 3 . She told him that John would come to apply for (申请) the job. 4 she got home and told John about the job, he was just watching television attentively. It made her so angry that she 5 the TV and ordered him to go and see the manager of the supermarket. John didn't want his wife to be angry. So he went. On the way, John thought if the manager 6 him the job, he wouldn't be able to stay at home and watch television all day long. He would have to . 7 in the supermarket every day. Then he had 8 . He decided to tell the manager that something was wrong with his shoulder so he 9 not raise his arm above his head. He was 10 the manager wouldn't give him the job. When he arrived at the supermarket, he told the manager that he needed the job. "Are you strong?" the manager asked. John explained that he couldn't raise his 11 above his head. John told him that he 12 an accident at home while digging in the garden. "How 13 can you raise your arm?" the manager asked. John lifted his arm 14 "Only this high," he said. "And how high could you raise it 15 the accident?" asked the manager. "This high," said John. And he lifted his arm above his head. | ||||
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