润滑按油膜状态分为液体润滑、边界润滑两种类型。
参考答案：错
解析：润滑按油膜状态分为液体润滑、半液体润滑和边界润滑三种类型
下列性质中正方形具有而矩形没有的是（ ）
A．对角线互相平分
B．对角线相等
C．对角线互相垂直
D．四个角都是直角
I don’t know if I him this evening. If I him, I will give the novel to him.
A．will meet, will meet
B．will meet, meet
C．meet, will meet
D．meet, meet
