题目

以下不是利用电流的热效应来工作的是：A．电饭锅   B．电烙铁   C．电热杯   D．电动机  答案：D解析:略 —Ouch! I can't bear your weight , young man.—Oh, ________ , but did I step on your foot?A.sorryB.I seeC.I knowD.why