中国煤炭可选性评定标准,适用于()粒级的煤炭。
A.小于0.5mm
B.大于0.5mm
C.等于0.5mm
D.大于0mm
参考答案:B
___________ from the top of the hill, the town looks like a diamond.
A.Having seen
B.Seeing
C.To see
D.Seen
轨道车变速器齿轮损坏的原因是什么?