设xy满足约束条件2x+y小于等于4

on which side does a bird have the most feathers.翻译 what is a skeleton?翻译 英语翻译which后面引导的这个是修饰睡得 machines 还是 parts 还是谁? 翻译To be eligible for the inventor awards under this policy,. we are only humen是什么意思? 受精的鸡蛋是不是生物 we are only a click away? 即将升入初三,给父母或朋友的一封信作文即将升入初三,有许多话想给父母或朋友说,请以书信的格式,给父母或朋友写一封信. 作文：给初三的一封信,怎么写 THE SPANISH DANCER怎么样 To last,To like.To trust.to cheat啥意思 伊豆舞女 THE IZU DANCER怎么样 影舞者 THE SHADOW DANCER怎么样 the teacher ,as well as all his student,__by the dancer"s performance.a was impressedb.had impressedc.impressdd.were impressed 有句歌词是sometimes it lasts in love 为什么last后面要加in,还是在这里in love被看成一个名词呢? 陈沆一字诗怎样改写 谁能告诉我陈沆一字诗的故事? 陈沆的一字诗怎么读 描写离别的四字词语急呀! 描写饥饿 描写人冷 描写人困的 四字词语 分开的 渔夫皱起眉,他的脸变得严肃、忧虑.什么描写方法快 描写分别的四字词语 什么死不屈要和西组成一个城市名 声东击什么死不屈中间是填我国城市名的. 人定胜什么落实出 五湖四什么诛笔伐 谢谢大哥哥大姐姐们帮帮我吧 说动道（）（）死不屈 A report from the School Food Trust says that .A report from the School Food Trust says that school canteens should be turned into restaurants to encourage students to eat healthy meals.这么长的句子应该怎么读,怎么断句,帮我翻译一 读了这篇文章你能总结出几条成语? 根据提示,总结出成语,1、美貌无比的人（）2、缺乏经验的人（）3、为政清廉的人（）4、违背祖父辈遗志的人（）5、地位低微人家的女儿（） "Pre-school education" is that part of education children recive before they go to school.这里children recive before they go to school应该是做一个定语从句、修饰education的,意思为“孩子们在上学之前所接受的”,recive应 一、写出下列动词的过去式.要全写,一个都不许漏.work _____ make _____ go _____ do _____ like _____ have _____ take _____get _____ am/is _____ meet _____ buy _____ come _____ teach _____ speak _____drink _____ study _____ play _____ On the wall( )two pictures.A.hang B.hangs C.hanged.D.hanging I'm going to -----a book?对不起，还有一个，What___you going to do after school?是are还是am?有赏！ 成语（ ）烈（ ）迈我找不到这个成语的答案