采用机床夹具,对切削量有()影响。
A.减小
B.增大
C.不变
D.减小或增大
参考答案:B
Which one has the same meaning as "Take your time"? [ ]
A. Take it easy
B. No hurry
C. Hurry up
D. Be quick
感染过程中首先出现是近期感染的标志()
A.IgG
B.IgA
C.IgM
D.IgD
E.IgE