题目

一交流电流的图象如图所示，由图可知     A．用电流表测该电流其示数为10A   B．该交流电流的频率为100HzC．该交流电流通过10Ω电阻时，电阻消耗的电功率为2000 WD．该交流电流瞬时值表达式为i＝10sin628t A 答案：ABD Whenever a patient needs an injection of Penicillin, the doctor does need to make sure whether his patient is ___ to the medicine.A．sensitiveB．addictedC．allergicD．efficient