单项选择题
A.40.9T B.85.8T C.42.1T D.50.9T
A.77.5T B.81T C.79.1T D.21.8T
A.74.8万 B.63.8万 C.52.8万 D.21.9万
A.445 B.418 C.862 D.556
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