A.2.33倍
B.10倍
C.100倍
[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
[单选题]A.27/25B.9/10C.3/5D.52E.1
[多选题]A.体积大B.结构复杂C.制造工艺要求高D.价格昂贵