【单选题】— Do you _________ what time the meeting will start? — Yes. It’s at 10:00 a.m.
【单选题】( )13. It’s not safe for you to go to the forest alone, for you ____ lose your way in it. A. need B. must C. may D. should
【简答题】研磨介质在筒内的运动状态对磨碎效果的影响?
【简答题】简述研磨介质在筒内的运动状态对磨碎效果的影响
【单选题】— Would you mind my taking this seat? — ______. A. Sorry, I can’t B. No,not at all C. It’s a pleasure D. Yes,it can.