问题
问答题 简答题
除氧器在运行中水位下降过快有哪些原因？
答案
参考答案：
1）锅炉省煤器、水冷壁、过滤器等部位的管子或给水管路泄漏。
2）锅炉上水量过大
3）化学水补充水量不足
4）锅炉安全阀或除氧器的溢流装置动作跑水
5）由于运行误操作如开启排污门等。
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除氧器在运行中水位下降过快有哪些原因？
参考答案：
1）锅炉省煤器、水冷壁、过滤器等部位的管子或给水管路泄漏。
2）锅炉上水量过大
3）化学水补充水量不足
4）锅炉安全阀或除氧器的溢流装置动作跑水
5）由于运行误操作如开启排污门等。
| 从下面方框中选择适当的选项填入短文中，使短文通顺，完整.选项中有两个选项是多余选项。 | |
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| Sarah Davis lives in Dalton, Australia, where her parents have a sheep farm. Dalton is a small county town 1 one hundred people. The nearest city is over one hundred and fifty kilometers away, so Sarah doesn't 2 go there. She likes her life 3 the farm. She has a brother called Jeff. They 4 go to school. In summer it's usually very hot. So the school day 5 early at half past seven and finishes at midday. At the moment, Jeff Davis is working in the woolshed (革毛包房). He is picking the 6 wool from the bad wool and is putting it into two boxes. Sarah is taking the good wool to the wool store. The work in the woolshed is hard, but Sarah and Jeff don't mind, 7 it's good fun. Jeff enjoys 8 with the animals. When he doesn't help his father, he reads books about farming. He is going to 9 Next year to study farming. When they finish in the shed, Sarah and Jeff are going for a swim in the 10 . They sometimes visit their old friends. |