溴丁烷制备实验为什么用回流反应装置?
参考答案:
此反应较慢,需要在较高的温度下、长时间反应,而玻璃反应装置可达到的最高反应温度是回流温度,所以采用回流反应装置。
单词拼写,根据句子意思,填入一个正确的单词。
1. What kind of s__________ do you want to become a inventor?
2. How you're going to i__________ yourself this year.
3. I w__________ if he will come here tomorrow.
4. The young r__________ out and jumped into the water to save the boy.
5. He is f__________ my broken pen.
BSC6000最多支持()个源信令点,支持()和()两种类型的信令链路.