简述进气道的总压恢复系数。
参考答案:
出口处的总压与来流总压之比称为进气道的总压恢复系数。总压恢复系数的大小反映了流动损失的大小,总压恢复系数大,说明流动损失小。
介导ADCC效应抗肿瘤免疫的抗体是()
A.IgA
B.IgM
C.IgD
D.IgG
E.IgE
— You are quite free now, I think.
— _____, I have tons of things to do.[ ]
A. In other words
B. On the other hand
C. On the contrary
D. In a word