发文字号组成部分包括什么？
参考答案：
发文机关代字、发文年度、发文顺序号。
Maybe if I _____ science, and not literature then, I would be able to give you more help. [ ]
A. studied
B. would study
C. had studied
D. was studying
制备熟大黄时，每100kg大黄片或块，用黄酒（）
A.5kg
B.10kg
C.20kg
D.30kg
E.50kg
