填制凭证时,正文中不同行的摘要可以相同也可以不同,当然可为空。 ( )
参考答案:错
Most people usually have less money at the end of the month than ____at the beginning.
A.which is
B.which was
C.they have
D.it is
体内法标记红细胞的标记率一般为()
A.20%~40%
B.40%~60%
C.60%~90%
D.90%~95%
E.95%~98%