1、器材：天平、烧杯、足量的水和牛奶，测牛奶的密度，写出实验步骤和表达式

一个边和一个角判断两个三角形相似,是什么定理.知道的回答 如果一个三角形的两条边和另一个三角形的两条边对应成比例,并且夹角相等,那么这两个三角形相似麻烦写出过程 how much did you___the dictionary?A,pay B,spend C,buy D,pay for_____they are to see the new film!A,what happy B,what happily C,how happy D,how happily"she studies hard""___and ___"A,so she does;so you do B,so does she;so you do C,so she does; so do y is复数形式 8+2等于,真的不懂 How much did you spend on the dictionary?这句话有什么问题 desk怎么变复数?以k结尾的都加s吗? desk的复数形式怎么写 desk（复数）是什么? 已知三角形的两个角和一条边,求另外两条怎么算,不是直角三角形 已知三角形两条边,怎么算另一条边一条边是550CM,另一条是1000CM,求还有一条边的长度 若(a^3-3ab^2+2b^3)/(a+2b)+|a^2+3ab+2b^2-6|=0,则实数a的值为 连词成句 sunglasses,prefer,you,which,do gloves,how much ,cost,do,the 用spend,take,pay,cost的适当形式填空：How much did the dictionary____ you? Tell me how much 空格；a:did the dictionary cost c:the dictionary cost; 用春天的使者比喻迎春花,这样写的好处是什么急需,好唠我把我全部得分都给你 That is a desk .(改成复数) --- Do you know how much that dictionary costs?--- No,I don’t.But I can _____ for you tomorrow.A.find out B.do it C.ask it D.see it为什么选A? This textbook is for the _______ students,not for the beginners.A .observationB .transportationC .advancedD .transfer This book is a favorite with students分析下这个句子的句型.看不懂为什么里面用a? This is the student's book和 This is the studentThis is the student's book和 This is the student is book 一个概念吗? This book is s___ for learners of English as a foreign language 翻译注音符号 ㄔㄒ ㄔㄜㄣ ㄒㄧㄢ ㄙ 在宇宙中,其他星球有生物存在吗 英语翻译In Move 是步骤2的意思么? 英语翻译LADIES JACKET,woven,furatcoller,with bronze-coloured buttons,2 pockets at front and 2 pockets without flaps at chest,inside pocket & inside mobile phone pocket,like original sample but without flaps at chest.UNIT PRICE:USD7.10 per piece F 速度の!Our school organize a charity show to _______money for project hope.( ).Our school organized a charity show to _______money for project hope and we were glad to see all the students _______their money.A.raise;raise B.rai I hope our charity show will be a ____(success). Those kind______will_______a charity show to raise money.(organize) 对This is her hairdryer.中的hairdryer提问 This is blue hairdryer 这句话错在哪里改出来 下列说法正确的是 A三个角对应相等的两个三角形全等 B两角对应相等,且一条边也对应相等的两个三角形全等C两边和其中一边的对角对应相等的两个三角形全等