单项选择题
A.1-3.5 B.2-4.5 C.8-9.5 D.10-11.5
A.0.1-0.2 B.0.2-0.3 C.0.35-0.5 D.0.5-0.8
A.0-0.05 B.0.1-0.3 C.0.15-0.2 D.0.07-0.1
A.0.1% B.0.05% C.0.06% D.0.08%
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