对于气量小，管线压力低的可采取（）。 ["放空测气","密闭测气","双波纹管测气","常规测气"]
工会应当健全职工服务体系，创新服务方式，组织下列哪些活动（） ["法律服务","困难帮扶","心理关爱","文化体育等活动"]
在Windows XP的“回收站”中，鼠标左键点击一文件，将会出现（）按钮。 ["复制","粘贴","删除","还原"]
Tube leaks in the distillate cooler of a two stage flash evaporator will result in （）. ["loss of second stage vacuum","contamination of the distillate","lower feed inlet temperature","contamination of the second stage condenser"]
（）是有差动流量计来完成。 ["密闭测气","放空测气","临时测气","常规测气"]
除一般与会者外，还有一些特殊类型的与会者需要特别关注。如贵宾VIP、（）、（）、（）等。
