A.水杨酸的核磁共振氢谱有4个峰
B.
C.
D.
[单选题]A.水杨酸的核磁共振氢谱有4个峰B.C.D.
[判断题]A.对B.错
[单选题]A.B.C.D.
[单选题]A.the art market had witnessed a succession of victoriesB.the auctioneer fi