用立铣刀粗加工时,铣削深度可选为()。
A.刀长
B.刀长-5mm
C.0.5倍刀长
D.1-1.5倍铣刀直径
参考答案:D
肾病综合征发生血栓、栓塞最常见的部位为()
A.肺动脉
B.肾静脉
C.冠状血管
D.下肢静脉
E.下腔静脉
Undoubtedly, life teaches us not to regret over yesterday, for it has passed and is ________ our control.[ ]
A. against
B. beyond
C. among
D. in