A.13
B.7
C.0
D.-6
[单选题]A.13B.7C.0D.-6
[单选题]( )A.13B.7C.0D.-6
[单选题]A.-2a-bB.b-2aC.2a-bD.b+2aE.a-b
[单选题]A.条件(1)充分,但条件(2)不充分B.条件(2)充分,但条件(1)不充分C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分D
[单选题]A.27/25B.9/10C.3/5D.52E.1
[单选题]A.条件(1)充分,但条件(2)不充分。B.条件(2)充分,但条件(1)不充分。C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起
[单选题]A.-2a-bB.b-2aC.2a-bD.b+2aE.a-b
[单选题]A.条件(1)充分,但条件(2)不充分。B.条件(2)充分,但条件(1)不充分。C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起