违反煤矿安全生产有关法律法规构成犯罪的，由（）依法追究刑事责任。 ["煤炭管理机关","司法机关","煤矿安全监察机构"]
吠陀
国家（）有关单位和个人报告医疗器械不良事件。
下列哪些案件应当由人民检察院立案侦查？（） ["暴力取证案","徇私舞弊减刑、假释、暂予监外执行案","隐瞒境外存款案","故意泄漏国家秘密案"]
You have an SQL query that takes one minute to execute. You use the following code segment to execute the SQL query asynchronously.IAsyncResult ar = cmd.BeginExecuteReader();You need to execute a method named Do Work() that takes one second to run while the SQL query is executing. DoWork() must run as many times as possible while the SQL query is executing. Which code segment should you use? （） ["while（ar.AsyncWaitHandle==null）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；","while（!ar.IsCompleted）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；","while（Thread.CurrentThread.ThreadState==ThreadState.Running）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；","while（!ar.AsyncWaitHandle.WaitOne（））{DoWork（）；}dr=cmd.EndExecuteReader（ar）；"]
试述竞争与合作的积极作用和消极作用。
