问题
单项选择题
当切断进料时，高压换热器的热交换处于不平衡状态，为避免温度过高，应在加氢裂化反应器（）床层通入冷氢。
A.第一
B.第
C.第三
D.第四
答案
参考答案：D
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当切断进料时，高压换热器的热交换处于不平衡状态，为避免温度过高，应在加氢裂化反应器（）床层通入冷氢。
A.第一
B.第
C.第三
D.第四
参考答案：D
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| Seven cats are best friends. They live in the same town. They always go 1 together on Saturdays. Every time one of them picks a place to go. Today, a 2 named Mimi should pick a place, but she doesn’t give 3 calls to her friends. The other cats are angry. They all go to Mimi’s house and ask her, “You give us no call. 4 ?” Mimi hears this and begins to cry. She 5 , “I will move to a new house with my 6 . It is in another town. I can’t go shopping with you again.” Her friends hear that and talk for a long time. Then they have an idea. "Don’t 7 . We will go to that town and do the shopping 8 your new house.” Mimi is very happy. She jumps high. Two days later, Mimi comes to her friends and says, “I don’t 9 to move. My father finds a new job here in this town.” Her friends are happy too. They still go shopping together on 10 . | ||||
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