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【多选题】
下列因素中，会使固体电介质的击穿电压明显提高的有（）。A.
清除电介质中的杂质
B.
防潮
C.
电极表面尽量光滑
D.
累积效应
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反馈参考答案：
举一反三
【简答题】How many cyclists will take part in the tour?
【简答题】痰液标本的采集时机:一般以____为好。
【单选题】How many companies were involved in producing the hydraulic part for the film Titanic?
A.
Three.
B.
Only one.
C.
Two.
D.
Four.
【单选题】How many companies were involved in producing the hydranlic part for the film Tianic?
A.
Three.
B.
Only one.
C.
Two.
D.
Four.
【简答题】真菌最有性孢子类型有（）。
【简答题】How many ________(part) are there in this story?
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