A.5 B.10 C.15 D.20
A.2；300 B.1.6；240 C.0.5；75 D.0.4；60
A.0.16 B.0.96 C.1.44 D.2.40
A.50% B.65% C.80% D.85%
A.375 B.625 C.875 D.1250
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