石英砂的主要成分

有一串数,第一个数是10,以后每个数都比前一个数大3,最后一个数是70,这串数加起来是多少? 英语改错,单词拼写1.His friend has s_______ from ill health for some years.2.The mother was g_______ to the young man for his saving her girl from the river.3.After a s_______ of failures,he finally passed the driving test.4.In which d_______ 英语改错题：(注意：全是语法错误,无单词错误)1.Because it is very cold,so I catch a cold.2.The boy looked the sky,but he saw nothing.3.He playing computer games in his room now.4.She is doing her homework every day.5.Giraffes usuall 帮忙回答几道英语题（写句子）1.明天天气好，为什么不去逛商场了呢？It's fine tomorrow.__________________ go shopping?2.每天晚饭后散步对健康有好处。_____________________ for you to take a walk after supper eve BABY,i will be here by your side,miss you day and night! 歪xie的xie怎么写 xie起手来的xie怎么写? What is done by night appears by day 飞亚达琅玕8038什么时候上市的 有两个正整数a,b,它们的平方和为585,而最大公约数于最小公倍数和为87,则a+b= 已知两个正整数的平方和是468,它们的最大公约数与最小公倍数的和是42,求这两个数. 在excel表格中输入1234前面会自动加上1234567890?怎嘛设置 同义句：at day as well as at nightif they want to get there on time ,they must travel at day as well as at night.if they want to get there on time ,they must travel_______ ______in the day ________ ________at night yesterdy,____________(遇见）one of her frends in the street made her very happy.(come) 1.My brother works as an architect.2.I don't know where Miss Li lives.3.What is your mother's job?4.I am in Class Two Form One. 他经历过常人没有经历过的低谷,翻译成英语怎么说? 他们正在走出低谷用英语怎么说 问几个化学题,愿会的人指点^@^xie判断是否正确(1煤块燃烧后,变成质量小得多的煤灰,说明煤燃烧的反应不符合质量守恒定律.(2碳在氧气中燃烧后,产生的二氧化碳的质量比参加反应的碳的质量 以上就是给你的药方 英文怎么说 xie子的xie怎么写? 花 Xie了的Xie字怎么写? 小明与父母发生了矛盾,小明经常玩游戏,耽误了复习功课,结果学习成绩下降父母对小明进行了斥责,严格禁止小明玩游戏,要求把时间都用在学习上.请你出主意,小明一家人怎样才能消除这个矛 将相和.完璧归赵.渑池会见经过 一辆汽车上午3小时行使135千米,下午2小时行使160千米.这辆汽车上午与下午行使的速度比是（ ）原来我以为是160÷2＝80（千米/时） 135÷3＝45（千米/时）80：45＝16:9,如果错,为什么错?那个，对 帮忙讲解完成句子英文：i have been looking forward to climbing one of the five famous mountains in China - - Mount Tai,( ）an old tempe .( stand ) 中文：我一直希望能…,山顶上有坐古庙.no whose top stands 或no the top of wh 四道选择题和六道完成句子 面临10年以来的最低谷英文怎么说? 学英语的情绪到了低谷该怎么办 我一直在困惑；为什么在我最艰难最低谷的时候你却选择离开了我?用英文怎么表达! 欧阳修为什么叫家人追字? 纸Xie怎么写 XIE纸烫和烟花烫那种适合我?我的脸形是有点圆圆的`然后下巴是尖下来的.我现在的发型是简单的斜刘海直发.我想换个发型.去电发 XIE纸烫和烟花烫哪种适合我?我想弄上面蓬蓬的感觉下面头发