A.4 B.16 C.25 D.10
A.4m㎡ B.10m㎡ C.16m㎡ D.25m㎡
A.不應(yīng)大于4歐姆 B.不應(yīng)大于1歐姆 C.不應(yīng)小于4歐姆 D.不應(yīng)小于1歐姆