A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.W=7693N,V=0.108m/sB.W=6693N,V=0.108m/sC.W=7693N,V=0.008m/sD.W=5693N,V=0.4
[单选题]A.Ⅰ、ⅤB.Ⅰ、Ⅱ、Ⅳ、ⅤC.Ⅱ、ⅣD.Ⅰ、Ⅲ、Ⅴ
[单选题]A.水杨酸的核磁共振氢谱有4个峰B.C.D.
[单选题]A.the art market had witnessed a succession of victoriesB.the auctioneer fi