以知一垄断企业成本函数为TC=5Q2+20Q+1000，产品的需求函数为Q=500-P

高山流水的寓言伯牙和钟子期 高山流水是不是出自寓言故事的词语 are,these,ducks,their.(连词成句） THESE PRNCIL,BELONG,THEIRS,NOT,US,BE,THEY,TO（连词成句） Lies can never changes face 我查的是:谎言装于罐中从未改变面貌 这意思 不对!急用! 翻译There is no excuse my friend,For breaking my heart,Breaking my heart again. you have an apple head请问 have an apple head!和女朋友昨天吵完架..今天她就对我这么说. a kind ofThis kind of bicycle ______ in Tianjin.A.is made B.are made C.made D.makesAB选哪个 kind of 与a kind of 的区别 a kind of与kind of的区别 伶伶俐俐,徘徊,头涔涔,叹息,一无所有,作为.一起怎么造一句话要造一句话啊 最后15分钟 the last ____minutes 求口才锻炼的文章(500字左右) 自从他来到这个城市,Jack一直在这家工厂工作 英语翻译 英语翻译名字：港富（中国）有限责任公司地址：珠海市担杆镇伶宾路2号203室. 有什么文章可以练口才RT you see,I I had got my watch repaired/got my watch repaired last mouth.这两句一样吗 翻译解释where did jack live? Where were you go Where did you go?哪个对 where do you go to?还是where do you go?为什么? 18.______ the day went on,the weather got worse.A.With B.Since C.While D.As为什么选择D不选择A呢 with the day going on,the weather got worse.和 as the day went on,the weather got worse为什末with时不用went而用going ——the day went on,the weather got worse.A.as B.with C.since D.while 为什么选A, ______ the day went on,the weather got worse.A.With B.Since C.While D.As为甚麼要选D ____the day went on,the weather got worse.A.With B.Since C.While D.As 初练口才的人适合读什么类型的文章马上要上大学了,我想给自己充充电, The result of the game is five-nothing.怎么翻译? 英语论坛上大家都在谈论自己的或别人的故事.请根据下面的提示写一篇短文.与大家分享杰克（Jack）的故事.要求：100词左右提示：1.一天杰克打算去公园2,.他坐公交车用了大约两个小时才到 假设你叫罗文,你的美国朋友Jack发来邮件,询问你寒假怎么过．请你根据下列提示内写短文提示内容1．每天早起,做运动锻炼身体：2.做作业．听音乐；3帮妈妈做家务．拜访朋友．Dear JackI'm happ 怎样写关于Dear Lily的作文 what is the difference between "是difference 还是different 那个朋友给我发几篇能练习口才的文章吗?谢谢