刮板输送机的缺点有哪些?
参考答案:
刮板链机溜槽磨损厉害,工作阻力大,耗电量大;
使用和维修不当时,刮板链易被拉断,运输距离受到限制。
The European Central Bank yesterday _______ the document was genuine but refused to make any further comment.
A.expected
B.suggested
C.concluded
D.confirmed
阿胶人汤剂应()
A.先煎
B.后下
C.包煎
D.另煎
E.烊化冲服