hardtocomeby

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飞的最快的飞机,速度多少? wq tg udm b We got over 1000 letters from our readers about their New Year's resolutions.(改为同义句)We get _____ _____ 1000 letters from our readers about their New Year's resolutions. we got over 1000 letters,faxes and e-mail from our readers about their New Year's resolutions.句中e-mail 为什么不用复数形式?We got over 1000 letters,faxes and e-mail from our readers about their New Year's resolutions.句中e-mail 为什 discovered的意思discovered the truth 2道简单的英语单选1.Do what you are told to.Don't argue____himA.with B.against为什么不选B呢2.-I'm terribly sorry I broke your glasses-Oh,really?_____A.It's OK with me B.It doesn't matterC.Don't be sorry D.I don't care为什么不选D呢 1、The students in my class never need to be made ____.They all work hard.A to learn B learning C to have learned D learn2、The first room I had of my own was a small one,only 3_____4 meters square.A by B with C in D of be discovered 求跑道周长的计算方法:一共有三条跑道.最里面的一条是126米.想知道外面两条的长度 y=3x^1/3-3/4x^4/3求其凹凸区间及拐点 用加 减 乘 除和括号把 1 5 3 9四个数组成得数为24要3种方法,急用 disappeared 和discovered 现有四个数,分别是5,5,5,1任意用加,减,乘,除及括号得数是24,每个数只能用一次 抛物线y=ax²+bx+c(a≠0)的焦点坐标 已知抛物线y=ax²+bx+c,求焦点坐标,用a,b,c表示,还要初中生能看懂的大致过程是圆锥曲线的焦点。网上说什么2py=x²,焦点是(0,p/2)。可是这种y=ax²+bx+c形式的抛物线怎么求焦点啊? 抛物线f(x)=ax^2+bx+c的焦点坐标是什么 Ⅰ.根据情景,完成下列对话.A:Hi,Bob!__1__ is the man with you?B:Oh,this is my __2__.He is my father’s younger brother.He __3__ a famous doctor in America.A:Has he just arrived here?B:__4__.His plane arrived here one hour ago.He asked me to 已知直角三角形的三边分别为a,a+b,a+2b,其中a大于0,b大于0,则a与b的比为,十万火急! 已知直角三角形的三边长分别为a,a+b,a+2b,其中b>0,则a与b的长为__ 被减数,减数差之和是900,减数比差小50,求减数 根据情景完成对话.A:——1B:That bike?No!It belongs to my brother.A:——2B:Yes,this one is mine.A:Is this your CD?B:No,it isn't.A:3——is it?B:It belongs to Peter.A:4——?B:No,they aren't mine.A:Whose books are they?B:They 5—— nos的基因多态性表现在哪些方面 根据情景,完成对话 根据对话情景,完成对话.Is that your family?Yes,it is.__________________________That's my grandpa/__________________________No,that is my aunt,my father's sister.Is this your mother?Yes,__________________________ 抛物线y=ax^2+bx+c(c≠0)的对称轴为直线x=2,但与y轴的焦点坐标为(3,0),则a+b+c的值为 3名男生4名女生全体站成一排,甲乙中间必须有2人求不同的排队方案的方法总数我用了两种方法1.4*A55=480,4是7人中甲乙之间有2人的次数,A55是去除甲乙随机排列2.捆绑法,把甲乙和之间两人捆在 根据情节 完成对话1.看见一个外国男孩的座位下有一只钢笔,你该怎么问呢?2.你的朋友li lei 不知道怎么拼写pencile,他该怎么询问?3.你到刚认识的外国朋友家玩,看见桌子上有一台电脑,你很想知 在一个减法算式中,减数是差的百分之50,已知被减数,减数,差的和是8,差是 在一个减法算式中,减数是差的50%已知被减数,减数和差的和是8,差是( ) 主动句改被动句句子顺序的问题 That man tied the dog to the tree改为被动the dog was tied to the tree by that manthe dog was tied by that man to the tree请问两个句子哪个对呢?by引导的部分必须放最后吗? 已知抛物线y=ax方+bx+c和x轴只有一个焦点,坐标是(2.0)(1) 求b c 的值(2)若此抛物线和y轴的交点为B,坐标原点为o,求三角形aob的周长,答案带根号. 已知抛物线y=ax^2+bx+c过点A(-1,0),且经过直线y=x-3与坐标轴的两个焦点,求该抛物线的解析式及其顶点