29•如右上【圖3】電路所示，定電流電路若VZ = 3.7V，VEB=0.7V，試求IL為何?
(A) 2 mA
(B)4mA
(C)6mA
(D)0.5mA

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統計： A(4), B(4), C(1), D(0), E(0) #1033862