edta二钠分子量

favourite、abacus 复数形式My favourite are those shoes 为什么favourite不用复数？ binoculars是单数还是复数 abacus呢如果用there be 句型 要怎么用呢` festivals are meant to celebrate important times os year.be meant to什么用法are meant to 用法,这句可以说festivals mean celebrating important times of year. 第一问however和but的用法区别.第二问I don't know what the word meant.这里what做什么成分 有had meant to do 的用法吗意思是什么? 类似于 Is it meant to be?句中非谓语动词be的用法!be后没有分词,也没有形容词,请问这是什么用法?请帮忙总结一下类似用法 Festivals are meant to celebrate important times of years.其中的be meant to是什么用法?此处be meant to是被动语态吗?mean doing意思是意味着,mean to do是打算做.那这个是打算做的被动语态吗? so i want 2 ask u,how do u find me? abacus(算盘）的发明过程,谁知道,最好用中英文都有的. 谁最早发明算盘abacus?%E8%AF%B4%E5%87%BA%E6%98%AF%E8%A2%AB%E8%B0%81%E5%8F%91%E6%98%8E%EF%BC%8C%E6%97%B6%E9%97%B4%E2%80%A6 写给乌鸦的颁奖词! Remember that forgiving does not mean forgetting. 给乌鸦的颁奖词 有给乌鸦的颁奖词吗? i bought a new iphone 6 plus just now用just改写i ____ _____　______ a new iphone 6 plus solution does not converge within the limits什么意思 In order to buy a TV,he sets __________ some money every month.up out along aside 选哪个 Does the series converge?If it does,try to find the sum∑n=1→∞ n/2^n 题就是这样~如果有字的话最好是英文 求证series 是converge 或者diverge?funtion是：(sqrt(n) cos^2(n))/((n^2)-2) 请问你的 SOLUTION DOES NOT CONVERGE WITHIN THE LIMITS 是怎么挤压模拟中出现 SOLUTION DOES NOT CONVERGE WITHIN THE LIMITS该怎样解决? “Which letter does not belong in the following series?”的汉语解释. Raymond英文翻译 用所给词的适当形式填空 Betty wants become a doctor when she grows up. I am on my way to future,where you are there.什么意思 I am on my way to future,where you are Mr.Page will have been teaching for a total of forth years.在这句话中,我想知道为什么要用will have been teaching(will have been doing)这个时态,而不是will have teached(have been done) 语法谓语和非谓语的区别.举一点例子 高一英语语法,同谓语和双谓语是什么,应该怎么区分. 英语那个转间接引语.什么时候过去式变成过去完成时.真心不懂 come to one's rescue例句 当直接引语改为间接引语,主句是一般过去式时,什么情况下从句用一般过去时,什么情况下用过去完成时啊. 直接改间接引语中过去时改过去完成时吗?如:he said,;"were the windows open?"或者he said,"why didn't she help me?"或者有这样的时间状语he said,"how did lucy come that night?"都要变为过去完成时吗?请帮忙改下以