锅炉滑参数停炉时，其负荷降低速率应（）MW／min，温度降低速率应（）℃／min，压力降低速率应（）MPa／min。
参考答案：≤1；<1；<0.1
根据句意及所给首字母提示，写出正确单词。
1. We should stop using p______ things. That can save a lot of trees every year.
2. I feel that he is s ___ for this job.
3. She likes to dress herself in an u ___ way.
4. The bridge is broken. Now it is being p ___ down by machines.
5. Charity tries to r ____money in different ways.
化学反应中加热的方法有：直接加热，垫石棉网加热，水浴加热等
（1）水浴加热的优点是______．
（2）下列实验操作都需要在一定条件下进行，请将可能用加热方式填入横线上
①乙酸乙酯制备______；②硝基苯的制备______；
③溴苯的制备______；④石油分馏______．
