市场失灵公共物品

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He's left a message saying that he has someing important to do.为什么用saying The first中间可以加形容词吗?比如 the very important first step is .老师说不可以的。我觉得有见过啊 Dress neatly!The first i_____is very important They say that first impressions are very important .是宾语从句还是表语从句? 中国东西走向距离是多少 如图所示,A,B是海面上位于东西方向距离5(3+根号3)海里的两个观测点,现位于A点北偏东45°,B点北偏西60°的D点有一艘轮船发出求救信号,位于B点南偏西60°且与B点相距20根号3海里的C点的救援 she likes giving her money to the people in need.All her friends think she is g----- Jenny likes buying clothes she sees__by fashion models填上wear的正确形式 l ___ two new friends a.have b.has c.am she spent a lot of time on her clothes which she would wear to the context.这句话有语法错误吗?有错误请指出并改正. 在我国古典文学中,有这样的诗句:“花谢花飞花满天,红消香断有谁怜?···一朝春尽红颜老,花落人亡两这是名著《______》中______写的《______》中的一句. 英语必修一问题Don't be late for the exam Mike .Mike the thacher told you () for the examA.to be not lateB.not to be lateC.are not lateD.to not be late为什么选C,而不选B?————————————————新群 成立雨雨, He came______(十二) in the English exam.There are many____________(架子)on the top of thebuilding. Eversleeping Xandria Ravenheart歌词及翻译 pure-play怎么翻译啊是电子商务的专业英语 新疆到哈尔滨有多远 从新疆到台湾有多远 求一种水生植物,有图,求学名是什么?我妈曾腌成酸菜,再做汤食用,味道好极了,因为是少数民族,所以不知道学名叫什么.生长在田里,不能生长在很深的水里,不像荷一样能扎根深水中.只能生长 这是什么园林水生植物?有图有真相后面长在水中的那些, pure as the south polar snow求翻译 She's tall,blonde,twenty-three and pure as the driven snow.这句话怎么翻译呀? Lucy and Lily were helping an old man ___ (cross)the street 史记高祖本纪的(病愈,西入关,至栎阳,存问父老,置酒,留四日,复如军,军广武.关中兵益出.) l am very pleased with what you are doing for i am very pleased with what you didfor us是宾语从句吗 哪个是从句哪个是主句 what you did for us作什么成分? Keep doing so,you will be pleased with what happens. 英语翻译就是父老苦秦苛法久矣的那个 桃花水母有几种? 桃花水母在那有? 《虞美人春花秋月何时了》中以水喻愁的千古名句是 春花秋月的意思 白花豌豆品种栽植园,偶然发现一株开红花的豌豆植株,推测该红花表现型的出现是花色基因突变的结果.为了确定推测是否正确,应检测和比较红花植株与白花植株中( )A.花色基因碱基组成 B.