A:had known, would not be
B:had known; wouldn’t have bee
C:knew; would not have bee
D:had known; would never be
下列四个图象分别对应四种操作(或治疗)过程,其中正确的是( )
在锐角△ABC中,设x=1+sinA1+sinB,y=1+cosA1+cosB则x,y大小关系为( )