风流的全压、静压、动压的正确关系是（）。
A.压入式通风时，
B.压入式通风时，
C.抽出式通风时，
D.抽出式通风时，
参考答案：A, C
常规民用爆炸物品基本包装单元一般为（）。
A、卷
B、发
C、箱
D、袋
She likes to use words ___ is clear to us.
A．of which meaning
B．whose of meaning
C．meaning of which
D．of which the meaning
