二次函数最大值公式

“中国大陆“应该翻译为“Mainland China ”还是“China Mainland”? chinese mainland请高手解答,中国大陆到底是用mainland China,还是 Chinese mainland?为什么?哪个会涉及台湾问题? It is better for you to be _____ about its consequences before you take any action.A.positive B. 现在完成时不能单独与准确时间连用的问题,(>_ 现在完成时一般不与准确时间连用,为什么must have done 可以和过去时间连用?He must have gone to the cinema last night.语法书里说现在完成时不和精确时间连用，为什么现在完成时和情态动词连用就可 英语翻译 不能与现在完成时连用的词语如yesterday.ago 行不行?我从三个小时之前就一直在写作业,是since 3 hours ago 英语翻译翻译The maths teacher is the person whom I got an A plus from. on和in的用法 on和above的用法 这两个on的用法有矛盾吗? 和现在完成时连用的一些时间状语求大神帮助already ever for just never since yet recently 意思是什么?怎么用? 单词：详细说下above和on 的各自 词性 、区别 、用法 单词：able和capable的词性、区别、用法详细说下 单词accurate 和exact 词性、区别、用法详细说下 Here are some of my sheep 英语 论述为什么马恩认为无产阶级革命的胜利在资本主义国家首先的发生这类资本主义国家的条件 根据所给释义,写出单词 one of the foods that you use to make a particular dish根据所给释义,写出单词one of the foods that you use to make a particular dish 新民主主义革命为什么是资产阶级革命而不是无产阶级革命?不是无产阶级领导吗?中国无产阶级社会主义革命是什么时候? After l have college,l want to find a good ----------- Professor Williams keeps telling his students that the future ______to the well-educated.A.belongs B.is belonged C.is belonging D.will be belonged 歌词有you know i know,give me everything,ture love还有"mama"(不知怎么拼)女唱的 什么歌呢?找很久了,-.- Give everything a shot .You never know whatGive everything a shot .You never know what（or who Stop talking in class的同义句改为同义句Stop talking in class.__ your mouths__,please.she spent half an hour swimming yesterday,it __ __half an hour__ __yesterday,they are going to Paris.they are__ __Paris.there will be a game between Class1 如何讲解situation state condition?请问高中英语教师及英语爱好者,如何讲解situation state 和condition之间的区别?尽量清楚一些 再帮我看看下面几到题； 1.She is in a good ________ of mind.2.He is in no _________ I would give my right arm to know about it. He was born there,he grew up there高精尖翻译 Luck to you 的汉语意思是什么? 照样子,写句子.例:he,listen to music what ise doing?he is listening to music.1.zip,answer the phone2.your grandmother,cook dinner He listen to music everydays listen变适当形式怎么改?改成什么? match-making是什么意思呀 当分手时说出"Your and me together,we can make magic.We're a perfect match. make a match of it they each { } two apples.Ahas Bhave选哪个,说名理由