使用平刨时,当两个刨刀同时操作的时候,须待料推过刨刃( )以外,下手方可接拖。
A.120mmB.130mmC.140mmD.150mm
参考答案:D
__________ you trust him, you may as well follow his advice.
A.So that
B.Now that
C.Even if
D.Except that
造血干细胞特征性表面标志物()。
A.CD8
B.CD34
C.CD4
D.CD22
E.CD16