如果被手动的机械需要较高的起动转矩应选用高转差率型异步电动机与它配套。
参考答案：错
Zhang Linghong's paintings preserved _____ of folk customs that have almost disappeared.[ ]
A. sights
B. scenery
C. scenes
D. views
泵的有效功率永远（）轴功率.
