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【单选题】
由于稳压管的功率较小，且稳压管稳压电路稳定电压是由稳压管的稳压值决定的，所以稳压管稳压电路仅适合（ ）、（ ）的场合。A.
电压较大，负载电流较大
B.
电压较小且变化不大，负载电流固定不变
C.
电压固定不变、负载电流较大
D.
电压固定不变、负载电流较小且变化不大
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【简答题】principal principle A bicycle or a motorcycle is built on the same though the force that moves them is different.
【简答题】A bicycle or a motorcycle is built on the same ____ though the force that moves them is different.
【单选题】A bicycle or motorcycle is built on the same , though the force that moves them is different.
A.
principal
B.
principle
【单选题】A bicycle or a motorcycle is built on the same __ , though the force that moves them is different.
A.
principal
B.
principle
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