精神病学的第三次革新是社区精神卫生运动的展开。
施工队进行现场施工时应()。便于甲方管理,及提高移动施工队伍的整体形象。 ["带好工器具","穿着工作制服","穿着工作制服","随身携带名片"]
语言中一个句子的长度是有限制的。
一种语言中的句子数量是无限的。
You are creating a Windows Forms application by using the .Net Framework 3.5.You create an instance of a Backgroundworker component named backgroundWorker1 to process operations that take a long time.You discover that when the application attempts to report the progress,you receive a System.InvalidOperationException exception when executing the backgroundWorker1.ReportProgress method.You need to configure the BackgroundWorker component appropriately to prevent the application from generating exceptions.What should yo do?() ["Set the Result property of the DoWorkEventArgs instance to True before you attempt to report the progress.","Set the CancellationPending property of backgroundWorker1 to True before you attempt to report the background process","Set the WorkerReportsProgress property of backgroundWorker1 to True before you attempt to report the background process.","Report the progress of the background process in the backgroundWorker1_ProgressChanged event."]
某甲和某工厂订立一份买卖汽车的合同,约定由工厂在6月30日将一部行驶3万公里的卡车交付给甲,价款3万元,甲交付定金5000元,交车后15日内余款付清。合同还约定,工厂迟交车一天,扣除车款50元,甲迟交款一天,应多交车款50元;如果一方有其他违约情形,应向对方支付违约金6000元。合同订立后,该卡车因外出运货耽误了时间,未能在6月30日以前返回。7月1日,卡车在途经山路时,因遭遇暴雨,被山上一块落下的石头砸中,车体受损,工厂对卡车进行了修理,于7月10日交付给了甲。10天后,甲在运货中发现卡车发动机有毛病,经检查,该发动机近日经过大修,甲遂请求退还给乙卡车,并要求该工厂双倍返还定金,支付6000元违约金,并赔偿因其不能履行对第三人的运输合同而造成的经营收入损失3000元。另有人向甲提出,甲可以按照消费者权益保护法请求双倍赔偿。该工厂意识到事态对自己不利,即提出汽车没有办理过户手续,合同无效,双方只需返还财产。甲能否按照消费者权益保护法请求双倍赔偿?