夹送辊前排轮使用标准是()。
A.≤8
B.≤8.5
C.≤9
D.≤10
参考答案:B
You can take away _________ you like most.
A.whatever
B.whichever
C.no matter what
D.no matter which
物料提升机的缆风绳安装符合说明书要求,且与地夹角应不大于60