视在功率在数值上等于电路中有功功率和无功功率之和。
参考答案：错
____________ is the second day of a week.[ ]
A. Monday
B. Sunday
C. Saturday
It was not until she arrived at the classroom she realized she had forgotten her coursebook.
A．and she realized
B．which she realized
C．then she realized
D．that she realized
