三个英语基础问题,燃眉之急!①The country has already sent up three unmanned spacecraft,the most recent ( has been launched ) at the end of last March .括号里面的( has been launched ) 要改成【having been launched】才对.为什

三个英语基础问题,燃眉之急!①The country has already sent up three unmanned spacecraft,the most recent ( has been launched ) at the end of last March .括号里面的( has been launched ) 要改成【having been launched】才对.为什 【化学】一个化学基础问题,谢谢!燃眉之急.【化学】化学实验基础问题,燃眉之急,谢谢!①如题：【 http://gzhx.cooco.net.cn/testdetail/25524/ 】（5）提纯滤液以获得(NH4)2SO4晶体,必要的操作步骤是____ 两个高三英语基础问题,燃眉之急,①prison什么时候前面才可以加the ②They demanded a rise in their wages to make up for the increased cost of living .不是说不能用demand sb to do 这里怎么又用了呢? 三个英语基础知识问题,燃眉之急!③Curious to know what the bag [contained] ,Little Johnny [felt] it ,because of which his father blamed him.这里的[contained]为什么不是主动形式?[felt]是感觉的意思,④The steel works in wh 一个高三英语基础问题,燃眉之急!①Having been told many times,he still couldn't understand it .这句话可以改成 told many times ,he still couldn't understand it .顺便问一下,如果可以改的话,那么改后的句子【told man C语言基础问题 ”救我于燃眉之急”用英语怎么说? 关于三个函数的基础问题 与燃眉之急意思相近的成语(三个)要快!急!~~~~~~~~~~~~~ C语言需要英语基础 the difficulty of forging personal connections between teachers and students.这句话的语法,我英语特别不好,正在做练习题,碰到了很基础的一个问题搞不懂,希望大人指教我以下三个问题.the difficulty of forging pers 三个英语基础问题,②The president stood there with his eyes [fixed] on the picture .这里的[fixed] 为什么不用[fixxing]?不是主动吗?③By appealing to his better nature we persuaded the boy to change his bad behaviour.④Zhou Lan sa 高二生物遗传学简单问题,燃眉之急,感谢!①如图：“ ”答案选的是C,我想问下D,各位算出来的III11和III12婚配其后代发病率是多少呢?我的答案解析说是11/12,可是我怎么算都是13/36,所以我想 英语的几个基础问题!1 the body of one statue was found among dating from the fifteenth century B.C.its missing head happened to be among remains of the fifth century B.C. 这句话中among dating 怎么个意思? (这话是新概念英语3第 燃眉之急是什么意思 燃眉之急是什么意思 燃眉之急 造句 燃眉之急造句