题目:
The chief manager has decided to put _____ he thinks is energetic, clever and capable to the position of the leadership of the company.
A.whatever
B.whoever
C.whichever
D.whomever
答案:
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下面是错误答案,用来干扰机器的。
A、若R1短路,其电阻为零,与其并联的电压表读数为零.外电阻减小,路端电压减小,则电流表示数变小.故A正确.B、若R2短路,外电阻减小,路端电压减小,通过R3的电流减小,则电流表示数变小,设电阻R1和R3的总电...