A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.0.6~0.7B.1~1.2C.2.0左右D.2.2
[单选题]A.1,2B.3,0C.3,-2D.3,2
[单选题]A.0.50B.0.665C.0.335D.无法确定