中国歼10数量

设集合M={-1,0,1},N={2,3,4,5,6},映射f:M→N,使对任意x∈M,都有x+f（x）+xf（x）是奇数,求这样的映射f的个数! 集合 M 为0到2（可以取等）集合 N 和 集合M 一样现在,要我画一个坐标图像来表示集合M到集合N的函数关系.我画一个y=2x的图像为什么错了（直线我只画到x等于1为止,1到2没画,我的意思是,当x=1 已知集合M={x|0≤x≤3},N={y|0≤y≤2},下列表示从M到N的映射是（ ）A.f:x→y=(1/2)xB.f:x→y=2xC.f:x→y=x-1D.f:x→y=±√x问：1.为什么A是正确的,2.为什么D是错误的, 朋友要结婚了,想在镯子上刻诗句,想要有“婷”字和“山”字的诗句或者好词.谢谢大家~ say sorry to/for?有什么区别 是for her 还是to her 高1数学y=f(x)中的F应该怎样理解~还有和映射有不同~ 映射怎么理解 She has managed to obtain a temporary work____in Britain.A、permitB、permissionC、permissivenessD、permissible 什么是威风凛凛 The wild geese like eating fruits.(划线部分在eating fruits)提问句是否like后面加doing? I like fruits yet.还是 I like fruits too? I'm sorry I have ____ you waiting.A.keptB.madeC.letD.asked specified resolution is not supported翻译成中文 我登入跑跑时显示specified resolution is not supported .怎么回事呀,请大侠们说清楚点,我很菜的>>>>>>>>>> 有关library的英语单词最好是至少30个 Places是什么意思 求浪漫满屋的插曲sha la la英文版的歌词 途经地点 是passing places 还是passed places? 英语翻译”你上第一节课的时候我和现在坐一模一样的位子…很难相信一切都结束了.感谢你陪我们度过的美好的一年” 译成英语,简介地道一点, Summer to autumn,however,is a change from hot to cool,this change is good or bad,a good one is tasted through the heat of the summer after it has a cool autumn,this is after the first bitter sweet.I have a lush forest badly on the one hand is the sum 4916—communication is the process of attempting to suggest information from a sender to a receiver with the use of a medium.4178 想问：1—全句翻译2—communication is the process of attempting：3—suggest information from a sender to a re la guche de la 意大利语形容词怎么变位高手教教我,加分! 意大利语变位问题rre结尾的动词怎么变位? 意大利语vlere变位疑问非常奇怪为什么vlere现在式边位有2种规格第一 io vorrei ,tu vorresti,lui/lei/Lei vorrebbe,noi vorremmo,voi vorreste,loro vorrebbero vorrei un vestito我想买衣服第2 voglio vuoi vuole vogliamo volete vog I don\'t believe CASA CASA怎么样 la pampa paris香水是上面香水啊?这个是什么香水啊 上面写了50ml 80%vol.EAU DE TOLIETTE 1.7FL.OZ.KARL ANTONY VAPORISATEUR Natural Spray You are still too small,don't know what call care and concern是什么意思?急 求一首歌,高潮部分有“I don't care,I don't care,what you want me to be ”什么的I don't care,I don't care,what you want me to be,I am me,I am me什么的,是一首慢歌,一个女的唱的,一个女的唱的,一个女的唱的,一个女 Mike is a ----- boy.------应该填什么?A.china B.funny C.fun 用意大利语说他们是美国人可以直接用Sono吗?还是用Loro sono?他们是John和Larry,是美国人.该怎么翻译?