[名词解释] 腹式呼吸

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.  You write the following code fragment. (Line numbers are included for reference only.) You need to ensure that a video file begins to play only when a user clicks Play.  Which code fragment should you insert at line 06?（） ["","","",""] 焦炉煤气一氧化碳含量是（）%，所以极具危险性。 ["6~9","27~31","50~65","60~67"] 共济失调 “互联网＋”的特征有（）。 ["创新驱动、重塑结构","尊重人性、开放生态","连接一切","跨界融合"] 风险回避有以下特点（） ["回避也许是不可能的","回避失去了从中获益的可能性","回避一种风险有可能产生新的风险","风险回避对策经常作为一种规定出现","经常不采用这种方法处理风险"] 腹式呼吸