未分类题

下列设备中属于矿山机械的是()。

A.采掘机械
B.选矿机械
C.矿山运输提升设备
D.通用机械

【参考答案】

A,B,C

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未分类题

按带式输送机线路布置分类，可以分为()。

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A:the main feature view of the Natural Approach①Language is best taught when it is being used to transmit message.②The Natural Approach claims to be able to incorporate any of the techniques of other methods.③People acquire a language from what they hear and understand.④Students' errors are not corrected unless meaning is affected.⑤Class time is devoted primarily to providing input for acquisition.B:the advantage or disadvantage associated with the feature

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