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第1题

6. 防止绝缘子、套管污损的措施不包括。 ( )(本题3.0分) A. 清洗绝缘子 B. 清洗绝缘套管 C. 涂敷硅脂 D. 人工刷污
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第2题

15. Mary ________ show us her new dictionary . ( )(本题1.5分) A. has asked to B. was asked to C. is asked D. asks
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第3题

15. Mary ________ show us her new dictionary . ( )(本题1.5分) A. has asked to B. was asked to C. is asked D. asks
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第4题

14. He arrived____ London ____ a cold winter night.( )(本题1.5分) A. at; at B. in; on C. in; in D. \; on
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