气柜施工完毕后，钟罩、中节的气密试验和快速升降试验的目的是（）。
A．检查各中节、钟罩在升降时的性能
B．整体气柜密封性能
C．检查预压基础
D．各导轮、导轨配合及工作情况
参考答案：A, B, D
解析：
气柜施工完毕后，钟罩、中节的气密试验和快速升降实验的目的是检查各中节、钟罩在升降时的性能，各导轮、导轨配合及工作情况，整体气柜密封的性能。
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| During the weekend, I usually like to 1 at home, but sometimes I like to go out for a walk 2 play football. My friend Jack works hard 3 the week. At the weekend, he always goes to 4 his uncle and aunt work on their farm with his family.The 5 is not very big, but there is always so much to 6 on a farm. The children look 7 the animals and give them food. Jack and his wife help 8 the fields. At the end of the day, they are all 9 and tired. After Jack's aunt 10 them a big meal, they go back home in a car. | ||||
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