已审核或出纳签字的凭证,可以直接删除。()
A. 对
B. 错
对已记账凭证进行整理,应先取消记账,取消审核签字后,才能做凭证整理。( )
A. 对
B. 错
Valve group parts mainly include _____, _____, _____, _____, and _____.
A. valve
B. valve seat
C. valve guide
D. valve key
E. valve spring
Valve transmission group parts include _____, _____, _____, _____, rocker arm assembly etc.
A. camshaft
B. timing transmission
C. tappet
D. push rod