问题
填空题
SS4型电力机车采用了（）相控调压。
答案
参考答案：不等分三段半控桥
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SS4型电力机车采用了（）相控调压。
参考答案：不等分三段半控桥
| 用括号内所给动词的适当形式填空。 | |
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| One day two friends 1 fishing. They 2 a dog with them. When they 3 near the river, they put their hats on a big stone (石头) and then 4 to fish. It was windy that day, and suddenly the wind blew their hats away. So they 5 the dog to 6 their hats back. When the dog got there, he 7 to take both hats together in his mouth. Do you know how he 8 it? He 9 that one of the hats was smaller than the other. So he 10 the smaller hat in the bigger one, and then he could carry them at the same time! |