A.480
B.540
C.660
D.720
[单选题]A.480B.540C.660D.720
[单选题]A.480B.540C.660D.720
[单选题]A.480B.540C.660D.720
[单选题]A.480B.540C.660D.720
[单选题]A.480B.540C.660D.720
[单选题]A.65%B.75%C.85%D.90%E.95%
[单选题]A.90°B.60°C.57°D.29°E.25°
[单选题]A.90°B.60°C.57°D.29°E.25°