A.14.2
B.16.4
C.18.6
D.15
[单选题]A.14.2B.16.4C.18.6D.15
[单选题]A.1B.2C.3D.4
[单选题]A.1.5B.2.0C.2.5D.3.0
[单选题]A.B.C.D.
[单选题]A.B.C.D.0
[单选题]A.0.71B.0.50C.1.41D.2.00