下列操作行为正确的是()
A.吹灭酒精灯;
B.钠倒入水槽着火,立即用水浇灭;
C.温度计也可以用来搅拌;
D.蒸馏时,用锥形瓶作蒸馏瓶
参考答案:D
When I was in London,at first I had no idea where I could my RMB for pounds. [ ]
A.charge
B.exchange
C.change
D.chance
麻疹概述