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Iterator patterns are created for collection objects, For collection objects, It must involve the addition and deletion of collection elements, and certainly supports the operation of traversing collection elements. If the traversal operation is also placed in the collection object at this time, the collection object will bear too many responsibilities. At this time, the responsibilities can be separated and the traversal of the collection can be placed in another object, which is the iterator object.　　李玉梅识破马家辉和孙殿起设下的消灭游击队的陷阱，秀英和惠珍这才相信李玉梅。三位女共产党员成立了党小组，坚持斗争，抓住了马家辉的狐狸尾巴。在最后一次斗争中，李玉梅为掩护党的通讯员小程，挺身而出，英勇就义。公元204年，曹操为率领曹丕、曹彰、曹植三子，和大将许褚众人攻打邺城。袁绍兵败，曹操进殿，权臣为献殷勤，逼迫甄宓献舞。不料曹丕对甄宓一见倾心，曹操颜面有损，一怒之下，将曹丕派驻南皮。甄宓知道袁家已败，又恐入曹操之手，上吊保洁被曹植救下。曹植见甄宓楚楚可怜，俩人日久生情。曹丕立功回邺城，曹操论功行赏，曹丕势必入甄宓为妻。甄宓为助曹植，以曹丕放弃与曹植世子之夺为交换条件，答应嫁给曹丕。曹植不明缘由，伤心不已。曹丕在郭笑等权臣献计下违背信约，再夺世子之位，终得继承魏王之位，篡汉称帝。曹丕三次封甄宓为后，甄宓不从。曹丕怒封郭笑得为后。郭笑得权后，假传圣旨刺死甄宓。甄宓死后，曹植伤心不已。面对曹丕的自相残杀，曹植留下七步诗，归隐洛水For safety. The memo should not be visible to the client1. Right-click "My Computer" > > "Properties" on the desktop and click "Advanced System Settings" on the pop-up page.更何况，你不认识我，总该知道郑和与大明吧。这是一间极为阔大的书房，书房古色古香，几排高大书架上整整齐齐摆满了书籍，其中不乏一些孤本珍本。