单项选择题
A.2 B.3 C.4 D.5
A.5000 B.2500 C.1250 D.1000
A.小于0.128 B.不超过0.107 C.大于0.107 D.不超过0.128
A.不超过0.28B.不超过0.107C.大于0.28D.大于0.107
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