润滑油(脂)在设备中的作用是什麽?
参考答案:
润滑,冷却,清洗,密封,减振,卸荷,保护作用。
In the supermarket foreign names of the products got_______, and I was confused about what to buy. [ ]
A. picked up
B. showed up
C. mixed up
D. fixed up
建设工程评标分为()等过程。
A.详细评审
B.初步评审
C.评标的准备
D.确定中标候选人
E.编写评标报告