细胞的绝对不应期时间为()
A.0.001s0
B.0.01s
C.0.2s
D.0.0001s
E.0.02s
参考答案:A
He was not _____ to the club because he wasn't a member.
A.allowed
B.admitted
C.permitted
D.approved
斜顶与导滑孔应取()配合。
A.过盈
B.间隙
C.过渡
D.较大间隙的