Ը޸Ӣ

3(x-y)=9,x^2+y^2=111.xy的值 2.3x^2-3xy^2 当x=3又4分之3,y=-|-9又11分之5| z=-（2.25）,求（-x) +（-y）+z的值一小时内交答案 i found she went to the same place _ i went to.A which B as C where 求详解 She went to the b____to enjoy the sands 关于“avoid、call、come”的介词短语 he doesn't know____________.这是一句宾语从句对吧,宾语从句用陈述句语序对吧,陈述句语序为关联词＋主语＋谓语＋其他对吧.那为什么正确答案是where his food is 而不是where is his food is 不是谓语么? Can you pick it up for me,please改为祈使句 1.Lucy ,can you help me [ ] that pen,please?A pick up B get up C look upD put up2.He has two gifts,one is for his brother,[ ] for his sister.A another isB the others C the other one is D another one is 3.Mum is miking a humburger [ ] A me B for me C 数学的方程式 把My pen is on the ground.Can you pick it up for me,please?合为一句please____ _____ ____ ____for me. could you please pick up the pen _me?横线里是TO还是for? 急.急.........................急需一篇周记........................................................快............................................................................................................................................. cos(a+π/2)=sin? under the bridge中文歌词红辣椒乐队的 S/（X+Y)=5S/(X-Y）=6求x、y 关于方程的,如果已知x+y=8,那么算出3x-y=a 这组方程x-2y=-a-3 英语连词成句going,bridge,the,is,under,the,ship road goes under a bridge here. The ship is going under the bridge请帮我翻一下 （1）4x^3+(2-a)x^2+4(1-a)x+a^2-3a+2=0（2）5x^2+x-x√(5x^2-1) -2=0第2题根号下（5x^2-1) 不包括2 That man doesn't know English at a__ please call Jim ___5366242.用什么介词?1楼不对！on at for of中选 怎么答什么都有啊 Watch means ( ) Chinese.Please call Jim ( ) 495-3569.填介词 命题a>b,是命题ac^2>bC^2的什么条件考虑等于c=0吗? 判断下列命题的真假:a>b是ac^2>bc^2的充分条件 (若ac=bc则a=b)是不是命题 1、“如果ac=bc,那么a=b”是一个假命题.反例：1、“如果ac=bc,那么a=b”是一个假命题.反例：2、“如果a²=b²,则a=b”是一个假命题.反例：3、“如果|a|=|b|,则a=b“是一个假命题.反例： 英汉互译一袋土豆怎么写 there is a river in the picture. 求函数y=根号（1-x^2)-根号(x^2-1)的定义域求函数y=根号（1-x^2)－根号(x^2-1)的定义域求函数f(x)=根号（1-x^2)＋根号(x^2-1)的定义域 用photo造句 用TAKE A PHOTO 造句`@一个短句子请加上含义 请要普通一点的句子