故障停炉的条件是什么？
参考答案：
1）炉内各承压部件因各种原因泄漏时；
2）过热器或再热器管壁温度超过各自的金属所允许的最高温度，且经多方调整不能恢复正常时；
3）锅炉给水、炉水、蒸汽品质严重低于标准，经加强调整无法恢复正常时；
4）锅炉严重结焦，难以维持正常运行时；
5）单台空预器故障，无法恢复正常运行时；
6）电除尘故障无法恢复正常运行时；
7）各种承压汽水管道及法兰联接处渗漏且无法隔离时。
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| John loved playing basketball after school. John's parents were anxious about their son because he 1 half of his spare time playing basketball, even though he would soon 2 the college entrance exam (高考). Many evenings, John returned home 3 at the beginning of the new term. His parents told him to concentrate more 4 his studies, but their words went in one 5 and out the other. His parents were so angry that they 6 his basketball. From that day on, John returned home on time but locked 7 in his room. At first, his parents dreamt their son could study hard to enter a top university. But 8 news shattered (破灭) their dream. John's pre-exam test scores were 9 . One night, John's mother looked into his room and 10 him reading a basketball magazine. So John's parents discussed the matter. They 11 to make a deal (约定) with John. If John scored high marks in the following tests, he could get his ball back and 13 once again; if he failed, they would keep the ball 12 he improved. John 14 reading his magazines. He started working hard. He started getting high marks and got his 15 back. The ball stayed with John until he entered a top university. | ||||
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