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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?()
治疗预激综合征合并房颤不宜用()
《建设工程安全生产管理条例》规定,达到一定规模的危险性较大的起重吊装工程的专项施工方案,需经()签字后方可实施。
头颅血肿,错误的是()
“伤寒二三日,心中悸而烦者”,应用()
物联网把任何物品与互联网相连接,是为了实现()识别、定位、跟踪、监控和管理。
铲运机适用于()工程。
治疗慢性粒细胞白血病的药物为( )。
计算机的每条指令必须包括两个最基本的部分,分别是操作码和操作数。( )
就法律关系的主体而言,债的主体()。
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