沙子是怎样形成的

2道英语单选请求解析.【1】We must strick to____we have agreed on.A、whatB、thatC、/D、how关键不在答案.我只是疑惑这句话的意思是“我们要为了被认可而奋斗”吗?如果是,为什么B不行?而且为什么题目 根据首字母补充句子.Please give a t_____ for this passage. 如图,某长方形广场四角铺上四分之一圆形的草地,若长方形的长为a米,宽为b米,圆形的半径为宽的三分之一,用代数式表示空白部分的面积.再求当a=12,b=9,π取3.14时,空白部分的面积? 如图,某长方形广场的长为a,宽为b,它们的中间是半径为r的圆形草地,四角也都是半径为r的扇形草地,则用代数式表示广场空地的面积是（ ）【要过程】 某长方形广场为a米,宽为b米,中间有一个圆形花坛,半径为C米.1）用整式表示图中阴影部分的面积；2）若长方形的长a为100米,宽为50米,图形半径C为10m,求阴影部分的面积（兀取3.14） 英语翻译they were underwater,meaning with a mortgage larger than the value of the house.怎么翻译?There are over 80 million single family homes in America,and it's estimated that in 2011,18 million of these were underwater,meaning with a mortg they have a butterfly house with over 200 linds of butterflies!上着课呢 急用啊这句话里的 with 、over 翻译为汉语:if you have a house full of children and rubbish,you will never kepp it clean. 奥数流水行船 例题船在静水中的速度是每小时25千米,河流速为每小时5千米,一只船往返甲、乙两港共花了九小时,两港相距多少千米? 元宵节的习俗有哪些?越多越好,最好有段落写作文可以借鉴. 请问proteus仿真软件中的滑动变阻器怎么仿真的啊?（怎么改变阻值）仿真时那个箭头不能滑动的. Wear trousers in their house翻译这个句子：MR.wilson talks a lot but mrs.wilson wears trouserous in their house you needn't wear hats in the house同义句 you____ _____ _____wear hats in the house急 Cape May Court House是什么 SAFE HOUSE COURT怎么样 I was not born yesterday 我们知道因式分解与整式乘法是互逆的关系,那么逆用乘法公式（x+a）（x+b）=x²+（a+b）x+ab,即x²+（a+b）x+ab=（x+a）（x+b）是否可以分解因式呢?当然可以,而且也很简单.如：（1）x²+4x+ was,yesterday,evening,care,baby,the,good,of,taken 连词成句 (ab+a)+(b+1)因式分解 (3^1+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)=?用乘法公式 （a+b）^2+2（a+b）+1+?因式分（ab+a)+(b+1)因式分解 (3^1+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)=?用乘法公式 （a+b）^2+2（a+b）+1=？因式分 若多项式a^2+(k-1)ab+9b^2能运用乘法公式进行因式分解,则K=_____RT This is a copy of catalog.It will give a good idea of the products we handle.大侠们帮忙翻译下 20.This picture will _____ to you some idea of the beauty of the country.A.convey B.spread C.e20.This picture will _____ to you some idea of the beauty of the country.A.convey B.spread C.express D.survey 一个圆柱如果将它的底面平均分成若干个扇形,截开拼成和它等底的长方体表面积增加12dm的平方如果截成两个小圆柱表面积增加了3.14dm的平方,求原圆柱的表面积 英语翻译I wanna take you homeTo my placeShare my dreams and my fantasiesI can't waitI wanna show u thingsYou ain't never seen beforeGirl I hear you cryingCrying out for moreTalk to me,talk to meAm I doing this right?Talk to me,talk to meAre u fee 意思You will see that there can be but one _outcome to this affair. Poetry in motion dancing close to me 把下列句子变成否定句和一般疑问句,并作出回答 (1)There is a photo on把下列句子变成否定句和一般疑问句,并作出回答(1)There is a photo on the wall.(2)There are sixpeople in the photo.(3)There is a bog next to the t 纳税人是不是负税人 纳税人就是负税人增值税一般纳税人从购买收取的价外费用,在征税时,应视为含税收入,计算税额是应换算为不含税收入.是对的还是错的 负税人与纳税人的区别与联系 纳税人和负税人有何区别? George 没有到,你认为他会出什么事了呢?英语翻译 ( happen to )