A.1kΩ B.2kΩ C.5kΩ D.10kΩ
A.2μS/cm B.2.5μS/cm C.3μS/cm D.3.5μS/cm
A.最小值的100% B.最小值的150% C.平均值的50% D.平均值的100%
A.0.5% B.1.0% C.1.5% D.2.0%
A.1/2 B.1/3 C.1/4 D.1/5
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