恩一星颜社元旦
@乐胖3932：为筹备元旦晚会,同学们设计了一个圆筒形灯罩,底色漆成白色,然后缠绕红色油纸,如图,已知圆筒高108cm,其平行底面的截面周长为36cm,如果在表... - 作业帮
仉购17174149698…… [答案] 将圆筒展开后成为一个矩形,如图,整个油纸也随之分成相等4段只需求出AC长即可, 在Rt△ABC中, ∵AB=36,BC= 108 4cm, ∴AC2=AB2+BC2=362+272, ∴AC=45cm, ∴整个油纸的长为45*4=180(cm). 故答案为:180.
@乐胖3932：庆元旦英语诗歌!急用!@@@###￥￥￥%%%^^^&&&***((()))我校举办元旦联欢会,让我准备一首英语诗歌,并关于元旦. - 作业帮
仉购17174149698…… [答案] THE NEW YEARRing out,wild bells,to the wild sky,The flying cloud,the frosty light:The year is dying in the night;Ring out,wild bells,and let him die.Ring out the old,ring in the new,Ring,happy bells,across the snow:The year is going,let him go;...
@乐胖3932：东东所在的小组共有4个人,元旦时相互送一件礼物,一共有多少件礼物? - 作业帮
仉购17174149698…… [答案] 6种,且不说你在问题分类时犯下的错误,快采纳吧
@乐胖3932：宁和房产元旦开展促销活动,一律九五折优惠,胡老师想买一套120m2、打折前总价为86万元的商品房,可以节省多少钱? - 作业帮
仉购17174149698…… [答案] 86*(1-95%) =86*0.05 =4.3(万元) 答:可以节省4.3万元.
@乐胖3932：急求一篇英语作文《我所期待的元旦假期》my expectation about my new year holodays要简单一点的.句式,语法不要太复杂. - 作业帮
仉购17174149698…… [答案] The new year holidays are coming.There are so many things that I want to do.First,I 'd like to have a good sleep,which I have expected for a long time.Because heavy class load makes me too tired.Second,I want to take exercises to make me healthy ....
@乐胖3932：一道关于概率的问题红星超市在元旦期间举办了有奖促销活动,设立了一个摸奖箱,箱内装有标上了数字1 - 20的20个形状完全的乒乓球,并规定:顾客每购... - 作业帮
仉购17174149698…… [答案] 这是个求数学期望的问题:假如不摸奖,则获得15元购物券;设摸奖获得购物券的数学期望为E(X),比较E(X)与15的大小就可以判断.Xi=1,2.20.E(X)=E(X1)+E(X2)+...+E(X20) (摸到各个号码的概率都是一样的1/20)=100*(1/2...
仉购17174149698…… [答案] 将圆筒展开后成为一个矩形,如图,整个油纸也随之分成相等4段只需求出AC长即可, 在Rt△ABC中, ∵AB=36,BC= 108 4cm, ∴AC2=AB2+BC2=362+272, ∴AC=45cm, ∴整个油纸的长为45*4=180(cm). 故答案为:180.
@乐胖3932：庆元旦英语诗歌!急用!@@@###￥￥￥%%%^^^&&&***((()))我校举办元旦联欢会,让我准备一首英语诗歌,并关于元旦. - 作业帮
仉购17174149698…… [答案] THE NEW YEARRing out,wild bells,to the wild sky,The flying cloud,the frosty light:The year is dying in the night;Ring out,wild bells,and let him die.Ring out the old,ring in the new,Ring,happy bells,across the snow:The year is going,let him go;...
@乐胖3932：东东所在的小组共有4个人,元旦时相互送一件礼物,一共有多少件礼物? - 作业帮
仉购17174149698…… [答案] 6种,且不说你在问题分类时犯下的错误,快采纳吧
@乐胖3932：宁和房产元旦开展促销活动,一律九五折优惠,胡老师想买一套120m2、打折前总价为86万元的商品房,可以节省多少钱? - 作业帮
仉购17174149698…… [答案] 86*(1-95%) =86*0.05 =4.3(万元) 答:可以节省4.3万元.
@乐胖3932：急求一篇英语作文《我所期待的元旦假期》my expectation about my new year holodays要简单一点的.句式,语法不要太复杂. - 作业帮
仉购17174149698…… [答案] The new year holidays are coming.There are so many things that I want to do.First,I 'd like to have a good sleep,which I have expected for a long time.Because heavy class load makes me too tired.Second,I want to take exercises to make me healthy ....
@乐胖3932：一道关于概率的问题红星超市在元旦期间举办了有奖促销活动,设立了一个摸奖箱,箱内装有标上了数字1 - 20的20个形状完全的乒乓球,并规定:顾客每购... - 作业帮
仉购17174149698…… [答案] 这是个求数学期望的问题:假如不摸奖,则获得15元购物券;设摸奖获得购物券的数学期望为E(X),比较E(X)与15的大小就可以判断.Xi=1,2.20.E(X)=E(X1)+E(X2)+...+E(X20) (摸到各个号码的概率都是一样的1/20)=100*(1/2...
