只有()转矩大于()转矩时,提升机才不会溜车。
参考答案:堵转;负载
With lots of trees and flowers _____here and there, the city looks very beautiful.
A.having planted
B.planted
C.have been planted
D.to be planted
软化水是指除去()的水。
A、阳离子
B、钙、镁离子
C、溶解氧
D、阴离子状态杂质