在交流电路中,电压与电流的相位差是0度。负载是纯有功。
参考答案:错
官渡之战中曹操取胜的主观原因是[ ]
A.采取正确的计策
B.军事力量强大
C.取得了民心
D.袁绍刚愎自用
That hero who died in the war was so brave that he never ____ to the enemies until death. [ ]
A. gave up
B. gave out
C. gave in
D. gave away