单项选择题
A.85.0 B.90.0 C.100.0 D.110.0
A.14.0 B.20.0 C.28.0 D.25.0
A.500.0 B.600.0 C.700.0 D.800.0
A.15.0 B.10.0 C.20.0 D.25.0
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