以下不属于不对称运行产生的结果的是().
A、谐波
B、负序
C、零序
D、增加系统损耗
参考答案:A
I can't thank you _______ much because without your help I _______ have won the first prize.
A.too; wouldn't
B.very; shouldn't
C.that; might not
D.so; couldn't
土地利用现状调查的三种类型成果是数据、图件、()。