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某天16:10，某厂维修班开始检修连接污油池的输油管线，16:20钳工甲将带有底阀的输油管线放入污油池内，当时污油池内油的液面高度为50cm，上面浮有30cm厚的污油，在连接100cm高的法兰时，由于法兰无法对正而连接不上，班长乙去车间喊电焊工丙，17:10电焊工丙带着电焊机到达现场，由于是油池附近作业，电焊工丙在现场准备好后，去车间办理动火，17:20，钳工甲见丙迟迟没有回来，快到下班时间，于是用电焊开始焊接，焊接3分钟左右，发生油气爆炸，爆炸将油池顶盖掀开，油池着火，钳工甲在油池附近死亡。 根据以上场景，回答下列问题 该起事故的性质是( )。
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阅读以下说明和关系表，回答问题1-3。[关系表] 院系院系代号院和名称主教学楼1101计算机系2号楼1102电子系3号楼1103机械工程系4号楼 学生020103李敏女02级110187.0020156陈鑫男02级100183.5031142杨睿男03级110178.5031326艾玲玲女03级110280.0040633胡栋男04级110290.0030915荣立伟男03级110373.5040047姜鲁男04级110381.5 [问题1] 试问以下行是否可以插入表“学生”中，并说明理由。(1)030204李欣兰女03级110677.5(2)吴磊男04级110381.0(3)051101侯超男05级1102NULL
人民法院对张某、王某共同强奸户案作出判决，张某被判处死刑缓期二年执行，王某被判处拘役，判决确定后，两人被交付执行。 如果张某在拘役执行期间表现优秀，需要再次减刑的，下列说法正确的是：( )
B Passenger pigeons (旅鸽)once flew over much of the United States in unbelievable numbers.Written accounts from the 18th and 19th centuries described flocks (群)so large that they the sky for hours. It was calculated that when it populationzxxk reached its highest point ,they were more than 3billlionpassenger pigeons—a number equal to 24 to 40 percent of the total bird population in the United States, making it perhaps the most abundant bird in the world. Even as late as 1870 when their numbers had already become smaller, a flock believed to be 1 mile wide and 320 miles (about 515 kilometers) long was seen near Cincinnati. Sadly the abundance of passenger pigeons may have been their undoing. Where the birds were most abundant, people believed there was an ever-lasting supply and killed them by the thousands,Commercial hunters attracted them to small clearings with grain, waited until pigeons had settled to feed, then threw large nets over them, taking hundreds at a time. The birds were shipped to large cities and sold in restaurants. By the closing decades of the 19th century ,the hardwood forests where passenger pigeons nested hadbeen damaged by American’s need for wood, which scattered (驱散) the flocks and forced the birds to go farther north, where cold temperatures and storms contributed to their decline. Soon the great flocks were gone, never to be seen again. In 1897, the state of Michigan passed a law prohibiting the killing of passenger pigeons but by then,no sizable flocks had been seen in the state for 10 years. The last confirmed wi pigeon in the United States was shot by a boy in Pike County, Ohio, in 1900. For a time , a few birds survived under human care. The last of them, known affectionately as Martha, died at the Cincinnati Zoological Garden on September 1, 1914. The underlined word “ undoing” probably refers to the pigeons’ ____.
2009年8月至2011年3月，H市B房地产开发公司在H市城市规划区内，通过合法手续，建成C商品住宅小区。建成后，王某购买了一套该小区住房，并签订了购房合同。建设中，B房地产开发公司利用在建工程贷款取得部分建设资金，并于该项目竣工验收合格之前，还清了全部贷款。同时B房地产开发公司还利用商品房预售取得了部分建设资金，购房户高某采取预售商品房抵押的方式，与B房地产开发公司签订了购房合同。 按照规定，B房地产开发公司应到( )办理该住宅小区商品房的房屋所有权初始登记。
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