问题
问答题 简答题
准同期并列的优、缺点？
答案
参考答案：
优点：没有冲击电流对电力系统没有影响；
缺点：因某种原因造成非同期并列时，冲击电流很大，三相短路电流还大一倍，且并列超前时间不宜掌握。
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准同期并列的优、缺点？
参考答案：
优点：没有冲击电流对电力系统没有影响；
缺点：因某种原因造成非同期并列时，冲击电流很大，三相短路电流还大一倍，且并列超前时间不宜掌握。
完型填空（15分） I have had thousands of classes since I started school nine years ago. But only one _1_ was the most important. It happened last term just after I had got a _2_ result in an exam. I was sad and had lost my confidence. I decided to go to a class which can tell me how to be_3_. The speaker walked into the room. But he did not start talking _4_ a teacher. Instead, he held up a twenty Yuan note(钞票)! “Who wants this?” he asked. Unsurprisingly, _5_ of us in the class held up our hands. The speaker smiled. Then he put up the note on the blackboard and asked the same question. Again, we all put up our hands. The speaker smiled again, but _6_nothing. Suddenly, he threw the note onto the floor! Then he asked the same _7_ a third time. I didn’t _8_ what the speaker was doing. Why was he asking the same question again and again? I didn’t know what to do. I wanted the note, _9_ I put my hand up again. After a while, he _10_ the note and started to laugh. “You have all just told me how to become successful,” _11_ said to us with the note in his hand. “The note is worth twenty yuan. It is _12_ worth twenty yuan, even though I throw it on the floor. You are like the note. No matter _13_ happens to you, you still have your worth.” When I heard those words, I was deeply moved. Suddenly, I _14_ I was worth a lot. I may have done badly in an exam, but it doesn’t _15_ I can’t do well in the future. If I believe in myself, I will be successful!
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