问题
多项选择题
装置检修时开启容器人孔的必备条件有（）。
A.残液退净
B.吹扫完毕
C.压力、温度降到安全标准
D.检查确认
答案
参考答案：A, B, C, D
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装置检修时开启容器人孔的必备条件有（）。
A.残液退净
B.吹扫完毕
C.压力、温度降到安全标准
D.检查确认
参考答案：A, B, C, D
One day at the end of the class, a wise teacher told each of her students to 1 a plastic bag and a bag of potatoes to school. The next day she told her students: “From today on, for every person you don't like in your lives, you can choose a potato, write the person's name and the date 2 it and then put it in the plastic bag.” Day after day, some of the students' bags were very 3 . They were then told to carry this bag with them everywhere they went for a week. They would put it inside their quilts 4 , on the seats when sitting in a car or on a bus , and next to their desks at school. The days carrying the bag around with them 5 students get to know what a weight they were carrying in their minds. They had to pay attention to it all the time 6 they wouldn't forget it. As time passed by, the potatoes went bad and 7 nasty(恶心). They all tired to get rid of them. Too often we think of tolerance（宽容）as a gift to 8 people, and it clearly is for ourselves! If we choose to keep our sadness and hatred（仇恨）in our 9 , we will have to carry them around all our lives. Do you think you have got 10 from the wise teacher and what she asked her students to do?
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