凸透镜焦平面

-Why___(keep)yourself so busy all the time?-Have a restWhy? i miss marry and would hate if our friendship is over for goodi miss marry and would hate___ our friendship is over for good为什么填it 而不填that?i miss marry and would hate___ if our friendship is over for good上面漏了个if。 Every day without you lack of a lot of joy Hope our friendship is as long as the heaven and earth endure China Society for people's Friendship Studies 重为10N的小球,半径R为6cm,放在墙与均匀的AB木板之间,AB=20cm,与墙夹角为α,不计木板的重量,α为多少时,绳子拉力最小,最小值是多少类似在三角形里有一个球 A端锁定并能转动，B端用水平绳索BC 如图所示,弧AB是半径为R的1/4圆弧,在AB上固定一个光滑的木板DB.一质量为m,如图所示,弧AB是半径为R的1/4圆弧,在AB上固定一个光滑的木板DB.一质量为m的小木块在木板的上端由静止下滑,然后沿水 【Blair and Chuck】MV-Never say Never这是什么电视剧的 MSN和E－MAIL的关系?MSN是什麽? I'll never forget the singer and the songs___attract me so much. A.who B.that C.which D.whose I‘ll never forget the song ———（sing）by her.weishene\\\ I shalll never forget h( ) her singing that song.Good s( ) should not have too much far or sugar. You are the most i do not want to forget this life and the loss of precious什么意思 when you have good friends you really feel special and want to share in the spirit of friendship.同志们来帮我翻译一下啊.语句要通顺! 求助一篇 Cover letterSecretary/ Data entry (concord / pleasant hill)Reply to: job-456647926@craigslist.orgDate: 2007-10-22, 3:21PM PDTSecretary/ Data entry Concord based, Large Commercial Landscape Construction Co. is looking for Secretary/ Data The room needs cieaning every day(改同义句) only if we understand can we care,only if we understand can we care, 原来,通过木板,在另一头能清楚地听到划木头的声音!这句话未尾是句号和叹号有什么不同 please restart zhe program for changes take effect什么意思 无为在歧路,儿女共沾巾!（.）最后是叹号还是句号? 写一个c 程序 Write a C programWrite a C program that receives from the command line a student ID (SXXXXX) to be used as a reference.Then the program asks the user to introduce the information about the results obtained by a set of students in th C语言程序write a program to display a Christmas tree* *** * *** |===V===百度的格式可能看不太清楚我解释一下就是那个一颗星的在中间,和下面的“|”以及“V”对齐输入一个数字是几就是几层,例如上 Write a text-based Tamagotchi program.When you run the program it should present the user with various options to play with,feed or clean their pet.The pet should be saved to disk in between sessions (use the pickle module) and the program should loo 中国最大的黄土堆积区是华北平原还是黄土高原?作业答案中说是黄土高原来着... 世界上最大的黄土堆积区是指?它东起哪里?西至乌鞘岭,南连哪里?北抵长城. 我们的生活那么快乐是句号还是叹号 吸烟有害健康 it（）（）（）our health（）smoke括号里填什么 board of trustees是什么意思 Is Guo Gang your brother?(改为同义句)Is Guo Gang your brother?的同义句要以此格式的:- Guo Gang - - 每个（－）为一个单词．kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk board of supervisor是什么意思 useful information you ve gathered!A What B What a C How D How an 英语表达“习惯做某事”的get used to do/accustom to do的区别?