问题
问答题 简答题
说明直流电机过热的一般原因？
答案
参考答案：
直流电机过热可能有下列原因：
①长期过载。
②未按规定运行。
③斜叶风扇的旋转方向与电机旋转方向不配合。
④风道堵塞。
⑤风量不够。
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说明直流电机过热的一般原因？
参考答案：
直流电机过热可能有下列原因：
①长期过载。
②未按规定运行。
③斜叶风扇的旋转方向与电机旋转方向不配合。
④风道堵塞。
⑤风量不够。
完形填空 My husband Jack hated Christmas. He didn’t hate the true meaning of ___16___, but the commercial aspects of it. Knowing he felt this ______17___, I decided one year to___18___the usual shirts, sweaters, ties and so on. I reached for something _____19__just for Jack. The idea came in an unusual way. Our son Kevin, who was 12 that year, was______20______at the junior level at the school he attended and shortly before Christmas, there was a non-league match____21_____a team sponsored by a church. These youngsters from the church, dressed in shoes so_______22_____that shoestrings seemed to be the only thing holding them together,____23______our son’s team were in their beautiful new wrestling shoes. As the match began, I was_____24_____to see that the other team was wrestling without a helmet designed to____25_____a wrestler’s head. They clearly could not_____26_____ them. Well, our son’s team ended up defeating them and took every weight class. But as the other team ______27_____up from the mat, they walked around with a sense of pride that couldn’t admit______28______. Jack, seated beside me, shook his head_____29_____, “I wish just one of them could have won,” he said. “They have a lot of potential, but______30_____like this could take the heart right out of them.” Jack loved_____31_____and he knew them, having coached little league football, baseball. That’s when the ____32______for his present came. That afternoon, I went to a local sporting goods store and _____33______some wrestling helmets and shoes and sent them to the church. On Christmas Eve, I placed the envelope on the tree, the note inside telling Jack what I had done and that this was his_______34_____from me. His smile was the_______35______ thing about Christmas that year.
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