A.a=-2,b=2
B.a=2,b=-2
C.a=-1,b=1
D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.柔红霉素B.羟基脲C.全反式维甲酸D.干扰素E.瘤可宁