A.一级乙等
B.二级甲等
C.二级乙等
D.三级甲等
第6题
A.一级100%,二级80%,三级50%
B.一级100%,二级80%,三级60%
C.一级50%,二级40%,三级30%
D.一级60%,二级50%,三级40%
第8题
A.一级水≤0.1μS/cm;二级水≤1.0μS/cm;三级水≤5.0μS/cm
B.一级水≤0.01μS/cm;二级水≤0.1μS/cm;三级水≤0.5μS/cm
C.一级水≤5.0μS/cm;二级水≤1.0μS/cm;三级水≤0.1μS/cm
D.一级水≤0.5μS/cm;二级水≤0.1μS/cm;三级水≤0.01μS/cm
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