单项选择题
A.F>S+W-R B.F=S+W-R C.F<S+W-R D.F≥S+W-R
A.0.59 B.0.65 C.0.75 D.0.5
A.125 B.525 C.500 D.625
A.12420 B.11690 C.12310 D.11653
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