小麦种子发芽初次计数时间为第（）天。
参考答案：四
—Can you come to my party on Wednesday?
—Sorry, I can't. I _______ finish my homework. [ ]
A. may
B. would
C. have to
下列容器的内压（表压）为（）的属于中压容器。
A.1.0MPa
B.1.5MPa
C.2.5MPa
D.1.2MPa
