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【单选题】
在绝缘子串组装中，对瓷绝缘子尚不应用不低于多少（ ）V的兆欧表表进行绝缘测定。A.
1000
B.
2500
C.
5000
D.
3500
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【简答题】完形填空。 Two weeks before Christmas, Mother told me we were going to my grandmother's house for the holiday. Grandma and Uncle Henry lived on a farm some 15 miles out of town. They had no electricity or ...
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