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【单选题】
当电磁铁的铁芯因某种原因而裂 开 ,则电磁铁( )
A.
能正常使用
B.
失去电磁吸力不能使用
C.
使用中会烧毁
D.
以上三种都不对
参考答案：
参考解析：
刷刷题刷刷变学霸
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