When ______ you supposed to arrive yesterday? [ ]
A. are
B. was
C. were
D. is
答案:C
衡量一个企业的生产过程组织得是否先进,可以以生产过程运行的( )为主要标志。
A.连续性
B.平行性
C.节奏性
D.平稳性
E.适应性
零起升压的试验条件及方法?