单相交流电路中的功率因数等于()。
(A)瞬时功率与视在功率之比
(B)无功功率与视在功率之比
(C)电路的总电压与总电流相位差的余弦
(D)电路的电压与电流相位差的正弦
参考答案:C
Sean's strong love for his country is ______ in his recently published poems.
A.relieved
B.reflected
C.responded
D.recovered