已知a等于二x方加三xy加二x减一b等于负x方加x减一加6b的。

Lucy,____ ____(not worry) about your lessons You don't have to worry about your grandparents. You __________worry about your grandparents. 宾夕法尼亚州与费城的关系 you needn't worry about your son.(意思相同) you don't ___ _____worry about your son. 费城英语怎么写 “费城”的英文怎么写? 费城英文介绍 长江——黄金水道——实行江海联运的4个城市在9点30以前回答的再追加130悬赏! 有关长江口“江海联运”的问题”江海联运“故名思意,海船进江,江船如海.然而,因为航道问题,海水腐蚀问题真正的“江海联动”实施起来尚有困难.例,海轮进江,犹如大卡车走在乡间小路,效 既是重要河港,又是重要海港,可以江海联运的 this is the one of the greatest men ___i've heard ofwhichthatwherewho He （）（consider）as one of the greatest men in the history of China 动词填空 The invention of the modern computer is one of the greatest contributions ___to man's efficiencyA.having ever been madeB.ever making C.ever made D.having ever made Einstein is one of the greatest s__ of last century 急性子的人做事情怎么慢下来越急越慢，越急越乱 急性子我是急性子 我是一个急性子的人!我对我女朋友实在不放心,有时候她做的事 我更本不理解!我也不算了解她!我们又不在一起!我该怎么办? 110m跨栏的世界记录是多少? 110m跨栏运动员的标准?我现在想尝试跑110m跨栏.但不懂规则! 希望懂行的告诉我一下! 尤其是身高标准和体重标准! 谢谢! 美国宾夕法尼亚州和加尼福尼亚州宾州有哪些好玩的地方!加州呢?值得一去的. 个人怎样规划自己的人生?是有关于职业生涯规划,职业德育科目的考试题目! 什么是陆海联运汽车货物运输? 陆海集团陆海电子事业部哪里去了?有美国力特PPTC自恢复保险丝,1812,150,12V,200K,原装力特标志；T60-025,50K,原装陆海标志,优惠促销中!6-6.5折,自恢复保险丝,陶瓷PTC热敏电阻和美国力特LITTELFUSE保险 There is an old man who loves m___ very much.One of them holds out his hand and c____ The old man c___ his hand and gets out of the water.When you say give to him he does nothing,but when you say take,he always does s__ 英语翻译 机电的定义 选择：How often are the Olympic Games held?选项：A.Each B.In C.For D.Every到底是哪个!CorD AN OLD MAN 翻译 黑色瞳孔用英语怎么说 how often are the Olympic Games held.里的game为什么要加s,hold为什么要用过去式?) How often are the Olympic Games held?()four years.要说明理由,其他的为什么不是A.Each B.In C.For D.Every The Olympic Games are heldA every four years B every four year C every fourth years D every four-years