已知三角形ABC的三个内角ABC对边分别为abc，若a+c=2b，且2cos2B-8cosB+5=0

用festival造句 when is your birthday为什么用are提问 running如何造句 how do you find it帮忙翻译下.,.谢谢! 英语改错“How long did you find it?" 物理中的一句话用手握住竖直的瓶子,瓶子静止在手中,手握的越紧,手对瓶子的最大静摩擦力越大.这句话对吗? 物理学中有这样一句话,在海拔3000米以内,大约每升高10米,大气压减小100帕（该怎样用） 物理学中有这样一句话,该怎样用在海拔3000米以内,大约每升高10米,大气压减小100帕 一句话表示物理学是类似于：是什么什么的........就是啥啥啥啥啥啥啥..... 帮帮哈0 - 提问时间2010-3-1 17:49 问题为何被关闭 猫头鹰的两只耳朵一只比另一只低,低处某种声音到达猫头鹰两只耳朵的距离.时刻.强弱等不同,使它能在高处准确判断低处的声源方向,利于捉食 ____(take)good care of the baby is his duty. 英语翻译Primitive by today's standards,it contained a mere 2300 transistors and performed about 60000 calculations in a second. 英语翻译In bodies possessing axial symmetry (for example,in a homogeneous cylinder),the axis of symmetry is one of the principal axes of inertia .Any two mutually perpendicular axes in a plane at right angles to the axis of symmetry and passing t 英语翻译the difference betwee constitutional law and statutory law in legal terms is nil.Both can be altered or repealed by a simple majority in Parliament(议会）.In practice,democratic governments do not use this opportunity to abolish all ci good luck to you, from on如何造句 c＿＿n的两条横线上应该填什么c什么什么n呀, c_ai_ 横线上应 填什么 (a-b+c)的平方=[(a-b)+(____)]的平方=（a-b)的平方+_____+(______）的平方=______ (填横线内容） 集合a__{a b c} 与 {a}__{a b c}有什么不一样吗?横线上填什么~ e_ _h_ _ _ _横线上填? h-ng-- 横线里填什么 横线里填什么? 横线上该填些什么 看补充英文题,横线上填啥,h开头An accident h____ in past. 为什么英语里have这个词句子经常不读出来? 谁能帮我写一篇关于"Men and Women's Prejudices"3人对话英语文章啊?3人对话哦... 《men and women's roles in a family》为题写一篇英语作文~200-300字~急用 定语从句时态问题Yesterday,my father met the person who he (will ,would )meet tomorrow.用“will”还是“would”还是都好用? It is （ ） to taka a taxi to school怎么填我急要, I ______ a taxi to school when it was raining. 求一篇英语口语对话.主题是“plants”、“men and women”和“auction”其中任选一个2个人的对话.3分钟左右.