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【单选题】
出现下列电路或设备故障时，都可能产生电火花的故障有A.
短路、绝缘损坏和缺相
B.
短路、缺保险丝熔断
C.
短路、绝缘损坏和保险丝熔断
D.
绝缘损坏、缺保险丝熔断
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反馈参考答案：
举一反三
【简答题】Although the colonists ________ to some extent with the Native Americans, the Indians’ influence on American culture and language was not extensive. A) migrated B) matched C) mingled D) melted
【单选题】I agree with him ______, but not entirely.
A.
until a certain point
B.
to some point
C.
to some extent
D.
until a certain extent
【简答题】Every aspect of Viking culture was to some extent influenced by ships, including ______.
【简答题】万用表可以测量哪些
【单选题】This will ______ pressure on the trains to some extent.
A.
relieve
B.
release
C.
resort
D.
reform
【简答题】The ambient quality in some cities was improved __________ a certain extent． [A] by [B] with [C] to [D] of
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