问题
单项选择题
在架空送电线路设计中，下面哪项要求是符合规程规定的？（）
A.导、地线悬挂点的设计安全系数均应大于2.25
B.在正常大风和正常覆冰时，弧垂最低点的最大张力不应超过拉断力的60%
C.在稀有大风和稀有覆冰时，悬挂点的最大张力不应超过拉断力的77%
D.在弧垂最低点，导、地线的张力设计安全系数宜大于2.5
答案
参考答案：C
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在架空送电线路设计中，下面哪项要求是符合规程规定的？（）
A.导、地线悬挂点的设计安全系数均应大于2.25
B.在正常大风和正常覆冰时，弧垂最低点的最大张力不应超过拉断力的60%
C.在稀有大风和稀有覆冰时，悬挂点的最大张力不应超过拉断力的77%
D.在弧垂最低点，导、地线的张力设计安全系数宜大于2.5
参考答案：C
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| Nowadays, a hospital always manages to keep its beds full. This is good on the one hand, and it's bad on 1 hand. One day, I went to see a sick friend at the hospital. I first went to the 2 desk, where I could get a permit to visit the patient. 3 I could ask which room my friend was in, the lady set down my name, age, filled out a form and 4 a bell. I was just about to tell her what I was coming for when two men arrived with a wheelchair, 5 me in it and pushed me down the hall. "I'm not 6 ," I shouted. "I'm just looking for a friend." "When he comes," one man said, "we'll 7 him up to your room." In a minute I 8 myself in a small room. In no time they undressed me and covered some other things 9 me. One man said "If you need anything, press the button." "I want to get my 10 back." I begged. "Oh, you can 11 us," a voice said, "Even if the 12 happens, we will see that your wife will get everything." They left and locked the door 13 them. I was trying to think of how to escape by the door when Dr. Ward came in with several of his 14 . "Thank God you finally came," I said. "It hurts that badly?" he asked. "No, on the contrary, I am not ill 15 ." Dr. Ward looked 16 . "If you don't feel any pain, that means it's much more 17 than we expected." Then he turned to his students:"This is the most difficult kind of patient to deal with because he refuses to 18 that he is ill. 19 he won't tell us where it hurts, he will never be well again until we find the hurt out for 20 by doing exploratory surgery (手术探查)." | ||||
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