A.9.8t,97%
B.9.8t,88%
C.11.8t,81%
D.11.8t,75%
[单选题]A.9.8t,97%B.9.8t,88%C.11.8t,81%D.11.8t,75%
[单选题]A.B.C.D.
[问答题]------------.
[单选题]( ).A.B.C.D.
[问答题]--------------.
[单选题]A.B.C.D.E.A、B、C、D都不正确
[单选题]A.1B.2C.3D.4E.5