A.
B.
C.
D.
[单选题]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.28500B.28800C.27000D.28650
[单选题]A.>101.325kPaB.=101.325kPaC.<101.325kPaD.不能确定
[单选题]A.直线B.圆C.正弦曲线D.椭圆
[单选题]A.68.8B.73.5C.85.3D.78.1
[单选题]A.1:2B.1:4C.1:1D.1:8
[单选题]A.>101.325kPaB.=101.325kPaC.<101.325kPaD.不能确定