排尽需要检修且含有解吸剂的管道、换热器内的物料是减少解吸剂检修损耗的有效手段之一。()
参考答案:对
— Her father is very rich.
— _____ She wouldn't accept his help even if it were offered. [ ]
A. What for?
B. So what?
C. No doubt.
D. No wonder.
防止催化剂结焦的方法主要有()
A.设备的改进
B.使用性能优良的阻垢剂
C.选择合适的反应温度
D.降低反应压力