問題詳情
18.图中电阻RRR3的阻值相等，电池的内不计。开关K接通后流过R2的电流是K接通前的
(A)─ 12
(B)─ 23
(C)─ 13
(D)─ 14材料铯钙镁铍钛逸出功(10-19J)3.04.35.96.26.6
(A)1/2
(B) 2/3
(C)1/3
(D)1/4
(A)─ 12
(B)─ 23
(C)─ 13
(D)─ 14材料铯钙镁铍钛逸出功(10-19J)3.04.35.96.26.6
(A)1/2
(B) 2/3
(C)1/3
(D)1/4
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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