在AutoCAD中任何图形都是可以分解的（）
参考答案：错
— I'm going to San Francisco for a couple of days.
— . I wish I could get away for a while.
A．It doesn't matter
B．Forget it
C．I really envy you
D．I can't agree more
A．时刻t线圈中电流的瞬时值icosωt
B．线圈中电流的有效值I
C．线圈中电流的有效值I=
D．线圈消耗的电功率P
cosωt
