单项选择题
A.≤1.6mg/L B.≤1.5mg/L C.≤1.3mg/L D.≤1.0mg/L
A.≤9.0mg/100g B.≤8.0mg/100g C.≤7.0mg/100g D.≤6.0mg/100g
A.≤0.13mg/m3 B.≤0.12mg/m3 C.≤0.11mg/m3 D.≤0.10mg/m3