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1,2,3,4如何变成24通过计算符号!拜托各位了 3Q 用烈组词填空()地撞击 ()地争论 ()地欢迎 部门\x05主机数量教师机房\x05110台教研室A\x0532台教研室B\x0528台教研室C\x0520台部门\x05可分配的地址范围\x05 子网掩码教师机房\x05192.168.120.1-(1) \x05255.255.255.128教研室A\x05(2)\x05 (5)教研室B\x05(3)\x0 IP地址192.168.1.0机房有30台计算机怎么分配子网掩码.是C类的 如图,⊙O 交⊙O 于A、B两点,过A点的直线分别交⊙O 、⊙O 于C、D两点,（C、D不与B重合）,连结BD,过C作BD的平行线交⊙O 于E,连结BE(1)求证：BE是⊙O 的切线；(2)若两圆圆心在公共弦AB的同侧,其他条 初三数学.这个题怎么做?很急!谢谢 Tom will be ______(tall)in ten years' time. 92. I first met Lisa three years ago. She _____ at a radio shop at that time.A. has worked B. was working C. had been working D. had worked I first met Lily three years ago.She _____ at a radio shop at the time.初升高2英语选择,1、I first met Lily three years ago.She _____ at a radio shop at the time.A.has worked B.was workingC.had been working D.had worked2、The reporter said th I first met Lisa three years ago.She ________ at a radio factory at the time.A.has worked B.was working C.had been working D.had worked 二战时德国的战略方针,以及军事力量分析. 是否存在某个实数m,使得方程x²+mx+2=0和x²+2x+m=0有且只有一个公共根,求m.（难得写的稍微讲下意思） 已知x^2-3x+1=0,则x^2/(x^4+x^2+1)等于? 已知某二次函数的图像与X轴交点的横坐标分别为X1=-4,X2=2,且图像经过点(0,-16)求这个二次函数的解析式 41题 找规律, 求找规律 是找规律 The roof fell after he had time to dash into the room to save his bady改错 the roof fell---he had time to rush into the house to save his baby?a after b.before c until He was made to clean the room ___timeA.the second B.the first c.a second D.second选哪个?为什么?句子意思是? 二战中的德国在经历了一战过后,为什么经济,军事,实力都恢复得那么强,一战的条约没能约束住德国吗? a小于b小于c小于d小于e任意两数之和中最小的三个数是36.32.37最大数是48.51;则e是 he insisted that I _____in the room on time to prepare____the meetingA was,for B am,at C be,for D should be ,at选什么 为什么 句子翻译一下 51减36又48分之37再减13又48分之19答案多少 _____baby ,she tipoed quietly into the room.A Not want to wake up B Don`t want to wake up C Not wanting to wake up D Don`t wanting to wake up walk quietly是什么意思 she walks into the room quietly什么意识 She walked quietly in the room lest she ___(wake) the sleeping baby.应该填什么? 2009-5-27 abcdef各代表一个数字,其中a>C ba d>f e 求我低碳,我快乐作文800 已知集合M＝{直线},N＝{抛物线},则M∩N中元素的个数为()(A)0　　　　(B)0,1,2其中之一　　　　　(C)无穷　　 (D)无法确定