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【单选题】

QC83系列磁力起动器的吸合磁铁呜叫声太大,可能是磁铁上的闭路环( )。

A.
发热
B.
绝缘损坏
C.
脱落或断裂
举报
参考答案:
参考解析:
.
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举一反三

【单选题】Questions 57 to 61 are based on the following passage. Within fifteen years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. T...

A.
attempts to find efficient ways of recycling wastes
B.
efforts to protect the environment in British cities
C.
a good way to locate plants for waste recycling
D.
a cheap way to get energy from waste materials