某金属氧化物MO14.4g，经CO充分还原后质量减少3.2g，MO是[ ]
A．FeO
B．MgO
C．CuO
D．CaO
答案：A
— May I put my luggage on the seat beside you, sir?
— _____. [ ]
A. With pleasure
B. Go ahead
C. Never mind
D. Take it easy
试述使用手信号引导接车时监控装置的操作方法？
