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理想的黑体是永远吸热而不散热的物体?如题：理想的黑体是永远吸热而不散热的物体,这样理解正确吗?理想的黑体是被定义出来的，我的意思这个定义本身是不是有缺陷呢？在实验室环境制 绝对黑体和平常说的黑色物体有何区别 为何黑色的物体不是黑体?所谓黑体是指入射的电磁波全部被吸收,既没有反射,也没有透射.那么黑色的物体不也是把光全都吸收进去了吗?为何黑体不是黑色的物体呢?还有为何黑体看上去不一 怎么处理衣服上的黑色物质 为什么说黑体是研究热平衡的标志物体?比如两个普通物体,一个5度,一个15度,平滑后都是10度.那么如果一个是黑体,一个是普通物体,黑体5度,普通物体15度,平滑的结果不也都是10度吗 初中英语选择题10Wang Feng____the Great Green Wall with many other peoplea.works outb.works atc.works on*请问the Great Green Wall 什么意思? 两个初中英语选择题1.How much relish do we need?a two relishesb two teaspoonsc two relishd two teaspoon2 A lot of sugar ___on the tablea is b are一定要讲清楚原因啊. A:Hi Clare~It is Jim.Is Peter Phone?B:No,he isn't.He is at work.( )A:Yes,there was no answer,but I left a message.a.Shall I tell hin you called?b.Have you tried his mobile phone?A:Hi,B.How nice to see you!B:Hi A：I have heard the great news!First pl ( )1.When I got to the park,I found many people ____ kites there.A.to flyB.flyingC.flyD.flew( )2._____ there are many people around me,_____ I still fell lonely.A.Though; butB.Though; /C.Although; butC.Because; so(另外问一下,Although能不能和 求一首很老很经典的英文歌,一开头是“an alone alone alone...”是一首很快的歌,应该还是舞曲. 问一下斑马是黑底白条纹啊还是白底黑条纹 斑马到底是白底黑条纹,还是黑底白条纹?如题还有,为什么会叫做“斑马”,明明是“条马”么~ 斑马是黑色的带有白色条纹,还是白色的带有黑色条纹. 斑马是黑马白条纹还是白马黑条纹? 1.Where＿＿?Your hands are so dirty.Don't touch anything in the room.A.have you gone B.did you goC.have you been D.are you going2.could you tell me＿＿?A.when the palaces change into the Palace MuseumB.when were the palaces changed into the Palac 1.Do you like the scenery here?Yes.It ___GuiLin.a.likes b.is like c.like d.look like选什么?有何区别?2.Try ____time.a.more b.another 1.How many bridges have been built _ Huangpu River?A.above B.over 这2个有什么区别 能不能再给我点例句2.Tom is the second tallest in Class2,but he is taller than _ in Class3.A.any other pupil B.any pupil c.all the other pupils 这3个 1when did you ____home last night?a reach at B get to arrive d arrive in2 I___what you said but I don't ___you.a believe;believebb believe in ;blieve in c blieve ;blieve in d believe in ;blieve 疯狂猜图里面猜品牌 红黑绿三种颜色是什么啊 疯狂猜图 咖啡色底上一个淡黄色留声机是什么?3字品牌 疯狂猜图才一个两个字的品牌,白色的底上面有三种颜色绿色的三角黑色的圆圈红色漏了个尖尖头 英语翻译（1） 2008年11月9日11点30分,我离开了北京.（2） 办登机手续和安全检查用了不到30分钟.（3） 出机场后,我坐了30几分钟出租车到达旅馆.下午2：30以前,我已办好了入住手续. 英语对话 关于暑假计划的两人对话A:打算暑假去旅游,欣赏名胜古迹B：打算暑假去打工,可以增加社会经验 地球污染的报告文章55 关于地球污染的论文现在社会,地球处于什么样的状态?等等,围绕地球污染的主题写一篇论文,字数不限. 高一关于暑假生活的英语对话 did school do you what today连词组句 you what after do today will school? what school do you study?这句话哪里有错? What did you learn in school today? 该怎么回答?有6个填空,QAQ拜托了 描写竹子不肯折节的诗句 古诗 英语对话解答（二）A： ?B：I am going to buy some books.A: ?B: I am going to buy the books in Xinhua bookstore.A: ?B:I am going there this Saturday afternoon.A: