边际收益公式推导

teacher求中文. father buys me an ice cream改为同义句 用donzens of time/times?哪个对?I have gone water-skiing dozens of time/times?我觉得还是用单数,因为times不是成了时代的意思.可是答案为什么说用复数? 英语翻译1一个睡在树下的男孩2明天要讨论的问题3正在讨论的问题4明天在会上讨论的问题5上次讨论的问题 开罗 猜一个食品 什么词语是对待的意思? 恭敬谨慎是哪个词语的意思要正确. 求高手分析下这种主语+动词+to+动词的结构比如He tend to think.He attempt to recreate.He may be encouragerd to exaggerates stories to ensure guilty verdicts. REMEMBER TO 做主语后动词用单三吗原句是这样的 Remember to _ the books that you borrowed from the library 横线上填什么词,用单三形式吗 什么动词后加主语不加to举几个例子 翻译B/O Qty. 英语翻译啥意思? 非谓语结构是哪三个? 什么时候用非谓语结构?现在分词与动名词都表主动与进行吗?过去分词表被动与完成?不定式表将来,是确定了用非谓语结构后再判断用动名词还是不定式或分时吗? 5 more books.more 5.books有什么区别 以“建国60周年,向国献礼”为题写一篇800字的作文高分高高高~ 求翻译,具体如题意思大概就好：心关闭,不会再接受任何人.含蓄点,别直接表达 - - Have you heard () Jim yet括号内填什么A.of B.about.C.from.D.with 英语翻译1.Whether you want to pursue an existing interest or develop new ones,your first move should be to check out the bewilderingly large array of clubs at the OUSU Freshers' Fair.If you miss the Fair,don't despair.The degree to which people g This is for everyone It's from me 重读闭音节.. this's me和it's me有什么区别,分别用在什么场合介绍自己的时候，"这就是我"用it's me好还是this's me 重读闭音节指的是什么? 帮解释一下前面非谓语的意思和用法,_______ which way to take,the little boy behaved like a real gentleman who comforted his sister from time to time.A.Leaving to wonder B.Having left to wonder C.Left wondering D.Left to wonder选C 非谓语用法1All of us have read thrilling stories in which the hero had onnly a limited time to live.Such stories set us ---------,----------what we should do under similar circumstances.Athinking;wondering Bto think;wondering C thinking ;to wand 谁知道梅花为什么冬天才开花 梅花为什么能在寒冷的冬天盛开?还越冷开得越美丽? 非谓语动词中定语和宾语补足语之间的区别宾补主要是补充说明,而定语是修饰,但在具体的句子中怎么样区别比如：I enjoyed the speech made by Smith.为什么这句中made by Smith是定语I heard the song being 非谓语动词作宾语补足语与定语的区别 this is 和it is的区别我在看新概念英语.想问一下this is 和 it is在疑问句回答中有什么区别．例：Is this your school?Yes,it is my school.Is this your ticket?Yes,this is my ticket. this is 和 it is 的区别我刚学的新概念一，其中有一道题是这样的：这是一辆瑞典小汽车。我写的是：this is a swedish car.可是我看后面的答案却是：it is a swedish car.请问这俩个有什么区别么？ 非谓语 want用法The sentence wants______once more.A.explained B.explaining C.being explained D.to explainYour spoken English wants____.A.improve B.improving C.to improve D.improved为什么？不清楚用法。我觉得第二题答案有点问题