问题
单项选择题
Electric generators can be protected against overload（）.
A.With switches
B.With a governor on the engine
C.With fuses or circuit breakers
D.By using heavy wire
答案
参考答案：C
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Electric generators can be protected against overload（）.
A.With switches
B.With a governor on the engine
C.With fuses or circuit breakers
D.By using heavy wire
参考答案：C