A.1A
B.7A
C.5A
D.不能确定
[单选题]A.70.7%B.80.O%C.67.4%D.60.0%
[单选题]A.70.7%B.80.O%C.67.4%D.60.0%
[单选题]A.70.7%B.80.O%C.67.4%D.60.0%
[单选题]A.Y=ABCB.Y=A+B+CC.Y=AB+CD.Y=(A+B)C
[单选题]A.-6B.-3C.3D.6
[单选题]A.79.5B.104.1C.126.8D.142.5
[单选题]A.60B.-60C.20D.-20
[单选题]A.79.5B.104.1C.126.8D.142.5