问题
单项选择题
在摩擦面间有一层具有一定厚度的润滑油膜，把摩擦表面完全隔开，这种润滑状态叫做（）。
A、相对润滑
B、极压润滑
C、边界润滑
D、液体润滑
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
在摩擦面间有一层具有一定厚度的润滑油膜，把摩擦表面完全隔开，这种润滑状态叫做（）。
A、相对润滑
B、极压润滑
C、边界润滑
D、液体润滑
参考答案：D
| 从II栏选出I栏每个句子的答语，每个句子只能使用一次。 | |
| I栏 ( )1. Happy New Year! ( )2. What's the date? ( )3. What's wrong with you? ( )4. Thanks a lot. ( )5. Would you like something to eat? ( )6. Can I help you? ( )7. Where's the station? ( )8. Hello, could I speak to Kate, please? | II栏 A. I'm looking for a pen. B. Go along this street and turn right. C. It's June 26th. D. I'm not feeling well. E. It's a pleasure. F. The same to you. G. Hold on for a moment, please. H. Yes, I'd like some cakes. |