A.
B.
C.
D.
[单选题]若,则区域D为( ).A.B.C.D.
[单选题]若,则区域D为( ).A.B.C.D.
[单选题]A.16.46mmB.18.32mmC.19.83mmD.25.53mm
[单选题]A.16.46mmB.18.32mmC.19.83mmD.25.53mm
[单选题]A.0.256MPaB.0.273MPaC.0.286MPaD.0.312MPa
[单选题]A.0.256MPaB.0.273MPaC.0.286MPaD.0.312MPa
[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.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