单项选择题
A、527650866 B、C23047100388 C、1019458 D、29/1771315
A.502/2 400/3 B.502/2 400/2 C.502/2 400/1 D.110/2 400 /2
A.0.15/3 B.502/0.15/2 C.0.15/2 D.0.15