胀管失效而泄漏会造成换热器（）
A、管板泄漏
B、密封垫泄漏
C、管子腐蚀穿透
D、换热效果不好
参考答案：A
She didn’t feel happy_____ in a block of apartments. She’d rather ______ in a traditional house.
A．living; to live
B．living; live
C．to live; living
D．to live; live
对歧化反应器的空速进行说明？
