打开任务管理器的快捷键是（）。 ["Ctrl+V","CTRL+ALT+DEL","ALT+F","CTRL+WIN7徽标键"]
加气软管应为奥氏体不锈钢金属软管。其公称压力不应小于最高工作压力的（）倍，最小爆破压力不应小于公称压力的（）倍。 ["2、4","3、3","4、2","5、1"]
工商系统专网，简称“专网”，是指由省工商局、市工商局和县级工商局（含工商所）内部局域网和相互连接的广域网组成的网络。（）
任务栏最右端的按钮单击时的作用（）。 ["打开窗孔","打开快捷菜单","显示桌面","切换当前窗口"]
Inflatable liferafts shall be serviced at an approved servicing facility every 12 months or not later than the next vessel inspection for certification. However，the total elapsed time between servicing cannot exceed（）. ["12 months","15 months","17 months","18 month"]
简述粘合剂的选用原则。
