问题
补全对话，情景问答
| 补全对话根据对话内容，从方框中选择最佳选项(其中有两项多余)。 | |
| |
| A: Can I help you? B:Yes, please. Today is Mother's Day.____1____but I have no idea what to buy.. A: ____2_____ B: Great ! But ____3____ roses or carnations (康乃馨)? A: I think carnations are better. They show happiness, sweetness and love. They are for mothers. B : How much are they? A: ___4_____ B: OK. I'II take it. ____5_____ A: Thank you and best wishes to your mother. |
答案
1-5 CAGBE
达到化学平衡时，假设容器体积压缩到原来的1/2（假设温度不变），平衡将如何移动（）。