顶点式和交点式

帮我做3道数学题 要求正确率 一道数学题比例的(在线等)要精确的x:3=y:4=z:5,求x-y+z:2x+y-z 第九题怎麼做 请求英语高手速写一篇很简单的初一下册英语的短文!假设你叫玲玲,你的美国笔友玛丽来信问及你的家乡,请你在这张有你家乡特色的明信片给予回复.要点提示：1、small village（村庄）,far from 这样的男人和女人会有将来吗?半年前经过相亲结识了他,他个子不高,但却温文尔雅.我们透过眼神给了彼此可以开始慢慢交往的讯息.那时正是年底,他的工作和应酬比较多,所以我们见面的机会 选择We are _ for the test.A busy prepare B busy preparing C busy to prepare D busy to preparing Let's play basketball some time.Good idea!what -----this afternoon A are you going to do B shall you do C are you going D will you do Let's do some f_____.Then let's play basketball.请问这里填什么单词呢?Let's do some exercise f_____.Then let's play basketball.请问这里填什么单词呢？ What time____ Mary usually____ (play)basketball? 11.可以的话过程也写 11-14题要答案: 1111×9×1111×9……(共30个1111和30个9) the clerks are busy preparing for the journey,they will be away for____.A.the few nest weeks,B.nest a few weeks C.a few next weeks D.the next few weeks im those days john with his classmates (was/were)kept busy preparing for the exam.选那个? 物体的初速度为2m/s,加速度为2m/s平方,当它的初速度增加到6m/s时,所通过的路程s为多少? 应用题-行程问题7东西两地相距7.5千米,小东从东向西走,每分钟走65米；小希从西向东走,每分钟走85米；小辉骑自行车从东向西行,每分钟行250米.三人同时动身,途中小辉遇见小希立即折回向东 2a-2分之3,b /3分之2a-8b不改变分式的值,把式子中的分子和分母各项系数都化为整数快速 1/2a-2/3b/a 不改变分式的值,使得分式的分子、分母中各项系数都是整数 He was always busy with his work.的翻译 My uncle is a scientist.He is always busy with _research_ work这里的research为什么是adj?不是这里面有个短语是be busy with 加n或Ving吗?急 自我介绍范文500字(有事例的) 我们学会了关心 作文500字记叙文要用一件事例写我怎么怎么关心的 根据句意写单词 It was ----- of you to leave the window open when you went out . Don't leave the water running when you brush your teeth.与Did you leave the window open.的区别 In summer,Simon always keeps the window______(open）when sleeping 不改变分式的值,把下列分式的分子与分母的各项系数化为整数.2a-2分之3b/ 3分之2+b 根据所给物品及价格提示,请你运用所学词汇和句型,介绍便民服装店的商品.要求语言流畅,语法正确.60词左右.开头已经给出,不计入总词数.sweater：￥38 bag：￥8 T-shirt：￥28shorts：￥18 socks：￥2 我想知道,你们由开始不懂得说到能出口成章是怎样转变的,还有就是对于你们现在来说,想到一句话立刻用英语表达了出来,这是经过怎样一个思考过程的,只需很短的时间吗?平时怎么刻意的去 ·寻求英语口语高手帮助·for the love of Mike是什么意思,源于什么?谢了哈! It is never too soon to start,never too late to learnnever too soon 和never too late. （the you school art festival be can in ）连词成句 关于ain't no（英语口语高手来来既然anin't 已经表示.am not,is notare not,has not,have not 为什么后面还加 no？重复了……