罂粟壳用量规定为（）g。
A.3～6
B.5～8
C.3～10
D.10～15
参考答案：A
— Do you think I could borrow your calculator? —（）
A.Yes, help yourself.
B.It doesn’t matter.
C.Yes, you may borrow.
D.Yes, go on.
管道法兰连接应符合哪些规定？
