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? Generally speaking, the factory mode is suitable: whenever a large number of products need to be created and have a common interface, they can be created through the factory method mode. Of the above three modes, the first cannot create the object correctly if the incoming string is wrong, and the third does not need to instantiate the chemical factory class compared with the second, so in most cases, we will choose the third-static factory method mode. ?人们可以从最远30公里的距离看到它们：就像一座咕哝、冒泡的火山，准备喷发，一朵发光的云从地球升起。这就是人们在日出时体验维多利亚瀑布的方式。当地人称之为：“雷声烟”。尤其是在旱季，一场不寻常的迁徙开始了：大象家族从 100 公里外的万基国家公园来到这里。然后发生了一个奇妙而非常罕见的奇观：他们游过赞比西河，就好像他们是一串巨大的珍珠。第七季以百年一度的大流行病导致世界各地的医疗崩溃为舞台，新局面迎来是日本最高峰的教学医院—东帝大学医院，把感染治疗和内科作为重中之重，并计划推迟不必要的紧急手术。曾经知名的外科被移往分院的大楼，内科医生推广不使用手术刀的化学手术，显示出兴起的迹象。被感染危机和东帝大新权力席卷的未知子，在如同战场般疲惫的医疗现场也毫不退缩地走上了自己的道路。In 2009, Xueershi preschool education began to offer mathematics thinking courses, and in 2011, Mobi Mathematics offered thinking ability training courses to children aged 2-15. In 2017, New Oriental will offer children's mathematics thinking classes to students who are about to enter large classes in kindergartens. This year, New Oriental Bubble Children will also launch mathematics thinking enlightenment picture books for first-year students, which have been used in some school districts this summer. Zhihui School, an elite education school, began to train children's thinking ability for children aged 4-12 in 2014. One-on-one leader also recently launched the discipline thinking quality education brand "Leader Children" for children aged 4-12.　　一色老师擅长研究犯罪，经常协助在查案中走进死胡同的镰仓警察破案。因为牵扯到魔怪与幽灵，所以镰仓的案件用平常手段是无法解决的。而精通心灵搜查的一色老师便因此成了名侦探。某天，警方托一色老师调查大富翁被杀案。那件案子看起来不是人类所能犯下的。朝镜子上一看，镜面上是一张青涩的脸。