If some sort of exception is thrown at line 34， which output is possible？（） ["a","b","c","ac","abc"]
按照《社会保险法》、《建筑法》的规定，取消原规费中危险作业（），增加工伤保险费、生育保险费。 ["意外伤害保险费","第三者责任险","施工装备险","工程一切险"]
变压器的可变损耗产生于（）。 ["铁芯中","绕组中","铁芯和绕组"]
You work as a database administrator for Certkiller .com. Your database is functional. One of the disks containing a mirrored redo log member has bad sectors in it. You are unable to fix the damaged file. How does the loss of a redo log member affect the instance of the database that is currently running？（） ["The instance would normally abort.","The instance would not be affected.","The instance would be invalid， so would have to be aborted.","The instance would remain open， but the LGWR process would fail.","The instance would remain open and would automatically create the missing file"]
手动正常停车时，先将丙烷制冷压缩机负荷用“DEG”降至（） ["10%","5%","0","15%"]
简述面向对象技术中“类”与“对象”的概念。结合Delphi中使用的组件，举例说明什么是类、什么是对象。
