【填空题】
67.机组进行定期工作前，应确认机组无影响切换___的操作。
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【填空题】
71.汽轮机断叶片原因：制造、安装___不良， 操作不当造成设备___，机组___过于频繁，叶片多次受交变___作用， 机组长期___运行， 汽轮机___或___长时间偏离正常值造成叶片疲劳。
【填空题】
107.1号机空侧密封油第一备用油源是由汽机___来的2.1MPa高压油，当主工作油源发生故障、氢油压差降到___MPa时，该油源由___压差调节器控制调节，维持氢油压差___MPa。
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Many subway riders read books or listent music in order to [ ] their time on the way to work
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In order to [ ]physical exercise, you have to exercise regularly and for at least half an hour each time
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He has a special feeling for the brilliant birds, and each spring he eagerly [ ] their return
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He was [ ]when he discovered that he didn't have enough money to pay for the red wine he had ordered
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