某垄断企业成本函数:TC=5q*q+20q+1000,需求函数：q=500-p

英语 听力 读英语 读音rainwater finds its way to rivers and lakes 我听录音以上这句话读的时候,为什么its不读呢? 英语中m的发音m发音的时候,需不需要舌尖抵住上齿~ 英语听力的读音为什么英语听力 有的地方 看原文听 也听不清发音?比如 there will be 听力 读成 never be8 short 听力 读成 8th 英语4级的听力啊 英标的m,n,l,有几种读音? 巴巴熊儿歌故事 HD 儿歌大全100首 宝宝睡前小故事 宝宝学唱儿歌 英文儿歌童谣 经典益智儿歌 睡前故事精选 唱儿歌 英文 Ellie Goulding的《Anything could happen》的mv是想表达什么如题 it is __ world of wonders,__ world where anything can happena:a .the b:a .a c:the .a d:/ ./ 一天内 the world where anything can happen 怎么理解? Will Anything Happen 歌词 anything could happen,反义疑问句 英语发音中,m,n和长勾n的区别谢谢 that .in order that .so…that .such…that的用法 so that,such that,too to之间的区别和各自的用法, 英语儿歌今天天气如何 英语儿歌天气怎么样 so these students go on a ropeway to cross the river to school. 翻译 英语儿歌怎么唱 翻译 我们一直尽力帮助那个穷学生 we（）（）（）（）help　　the　　poor　　student 唱给妈妈听的英文儿歌~~适合4-6岁小朋友 母亲节唱歌妈妈听 英语翻译We want to help these endangered animals.We want to help these animals ___ ___of dying out. in order to和so that的区别I sent the parcel dy express that morning______my mom received it that afternoon.填那个呢?为什么.还有别忘了告诉我这2个词组的区别...我搞的要晕掉了...不好意思啊啊啊...我写错了 是in so that,so as to,in order to 怎么区别?分别有什么用法? She lived in the house ______ the broken windows. 英语翻译She has to visit her grandmother on SundayHer grandmother wes happy to see herThere she found a small girl crying inthe cornerShe was lost snd Cindy helped her find her mother She lived in the house ______ she used to live.where?为什么? 5.She lived in the house ______ windows were broken.6.She lived in the house ______ the windows were broken. what a clever girl! 请问 what a clever girl 与 what clever girl有区别吗 a girl clever what 连词成句 What a clever girl she is!可以换成How感叹的句型呢?为什么?别人说 what 对名词提问,how对副词提问,这儿的名词,副词 是指 主语,还是修饰主语的那个成份?How well she sings!可以换成what感叹的句型么？ 英语翻译sweeping turn to the 请翻译整句话谢谢.