催化剂的热崩和什么因素有关？
参考答案：
它主要和再生温度、补入再生器的新鲜催化剂中含水量、反应-再生系统蒸汽含水量及稀相喷水有关。
肩关节训练运动器（肩轮）的作用是什么？
It's based on the idea ____ all people are created equal, ___ is accepted by most people.[ ]
A. that; that
B. which; which
C. which; when
D. that; which
