单项选择题
A.0.3～0.6g B.0.5～1g C.1～3g D.3～15g E.10～30g
A.0.03～0.06g B.0.06～0.1g C.0.1～0.3g D.0.3～0.6g E.1～3g
A.0.003～0.006g B.0.006～0.01g C.0.01～0.03g D.0.05～0.1g E.0.1～0.3g
A.0.003g B.0.006g C.0.009g D.0.03g E.0.06g
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