[案情]陈某(女)与李某系夫妻,二人1989年结婚,育有一子。生活中,李某经常打骂陈某。2010年6月25日晚,二人再次争吵,李某持铁管对陈某进行殴打,并用烟头烫陈某下颌,用圆珠笔在其身上写画,陈某不堪忍受,产生将李某杀死的想法。次日凌晨,陈某趁李某熟睡,将家中客厅、卧室的窗户关闭,将厨房内的天然气阀门打开,软管拔掉,使天然气泄漏,企图以此杀死李 [Case] ​​Chen (female) and Lee Department of husband and wife, the two married in 1989, have a son. Life, Lee often curse Chen. The evening of June 25, 2010, the two quarrel again, Lee held iron pipes to beat Chen, and with the cigarette-burning Chen a lower jaw, with a ball-point pen in his body painting, Chen unbearable, resulting in Lee killed The idea. The next morning, Chen while Lee asleep, the home living room, bedroom windows closed, the natural gas valve in the kitchen open, unplug the hose, so that the natural gas leaks in an attempt to kill Lee