题目

进行蒸发操作时，下列操作正确的是（ ） A . 使蒸发皿盛满滤液，用小火加热 B . 等到蒸发皿中出现较多量固体时停止加热 C . 待溶液蒸干后，再停止加热 D . 将蒸发皿放在石棉网上，用酒精灯加热 答案：B听下面一段材料，回答第1-4题。1. Where does the conversation happen? A. On the phone. B. In a restaurant. C. In a hotel.2. How many people can the private room hold at most? A. Nine. B. Eleven. C. Eight.3. What is the name of the man? A. Genkins. B. Jinkins. C. Jenkins. 4. When will the man arrive on Sunday evening?A. 5:25. B. 5:15. C. 5:30.