回溯法求解01背包问题这道题

据说这道高考数学题难倒全澳州的考生 这么厉害?
上周五(10月30日),澳大利亚维多利亚州举行了一年一度的高考(VCE)。当关键的数学科目考完后,很多考生都去社交媒体上吐槽——其中一道题目实在太难!题目是这样的:50分的硬币都是正十二边形,把两枚硬币并排放在一起,求夹角。五个选项分别是A. 12° B.30° C.36° D.60° E.72°。难吗?据《每日邮报》报道称,就因为这道题,澳洲12年级的学生(相当于国内高三学生)再也无法直视50分的硬币了!在接下来的几天里,很多学生都在家里继续苦算答案。而在社交媒体上,它已经成为一个热门话题。连美国著名歌手“50美分”(50 cents)也不幸躺枪。“去**的50美分!我根本不喜欢你的歌!”50美分:怪我咯?“这次考试根本不是为了测试我们,而是在耍我们,这让人怎么准备。”一名学生说。“对我来说求50分硬币的夹角是不可能的,因为题目没有给出任何其他角度或长度,无法代入公式,所以根本算不出来!”另一名学生总结道。“这就是个垃圾题目。”还有学生这样告诉《每日邮报》。“还在算这道题,”一名学生在自己的Facebook上说,并贴了一张两枚硬币放一起的照片,希望实物能给他带来一点灵感。不过在社交媒体上,考生们遭到了网友的嘲笑。他们纷纷表示,对12年级的学生来说,这道题也太简单了吧!比如,一名父亲就说:“就这还难住了12年级的学生?别逗了!我家5岁的小孩都能算出来!”还有网友说:“其实很简单,是他们想太多所以被难住了。”当然也有部分学生答对了。“还好我写对了,不然就太丢人了。”有考生给出了正确的解法。你能想到更简单的方法吗?本来考生们是这样参加高考的看见这道题之后的表情大概是这样的……
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本贴相关题目
Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself. Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.
Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?
AAmong the parts of its business that Vernon does not plan to outsource are some that require standards of accuracy too high for most independent suppliers to provide at lower cost than Vernon can.&&BVernon itself acts as an independent supplier of specialized hardware items to certain manufacturers that formerly made those items themselves.&&CRelatively few manufacturers that start as independent suppliers have been able to expand their business and become direct competitors of the companies they once supplied.&&DVernon plans to select the independent suppliers it will use on the basis of submitted bids.&&EAttending to certain tasks that Vernon performs relatively inefficiently has taken up much of the time and effort of top managers whose time would have been better spent attending to Vernon's core business.&&
正确答案: E
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Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself. &Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?(A) Among the parts of its business that Vernon does not plan to outsource are some that require standards of accuracy too high for most independent suppliers to provide at lower cost than Vernon can.(B) Vernon itself acts as an independent supplier of specialized hardware items to certain manufacturers that formerly made those items themselves.(C) Relatively few manufacturers that start as independent suppliers have been able to expand their business and become direct competitors of the companies they once supplied.(D) Vernon plans to select the independent suppliers it will use on the basis of submitted bids.(E) Attending to certain tasks that Vernon performs relatively inefficiently has taken up much of the time and effort of top managers whose time would have been better spent attending to Vernon's core business.我徘徊在C和E & &C和E好像都对 啊 & & &纠结啊
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c。你所说的E 说的 CORE OR NON CORE TASK,和outsource product无关。
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可是答案是C啊
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stimulus的逻辑结构是outsourcing可降低成本,一公司为了降低成本(目的),把一些业务外包出去先看C,C是通过消除削弱的可能达到支持的作用,承担外包的公司不会与Vernon竞争,消除了不利的影响因素再看EE只是说outsourcing可以节约时间和让manager做core business,并没有对降低成本的起到任何影响(如果说让manager做core business可以降低成本,这就有二次延伸,不如C直接)
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我看错了 & 答案是E 。。。
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坚持是CE的time和core business不能确定公司的profit就一定增加但C如果新的竞争者参与会使得profit减少
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I think the answer is EThe company's purpose is to boost its profit by decrease its costC is irrelevantWe all know that in the business world,there is no forever friend.Even though the outsourcing-company will become a director competitor,temporary coorperation is deserve.)The plan is just focus on company's RECENT situation.E is correct:It points out that if the company implement the plan,the company can decrease OPPORTUNITY COST.
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好吧~~~其实这题好像是一道削弱题的改编~~~我觉得C和E都有延伸的意思,都没有直接说道cost这个核心但DENGTS同学指出opportunity cost作为一个本科学经济的同学,我还是比较认可的~~~如果stimulus里探讨的不是会计意义上的成本,而是经济成本那E的确是公司的opportunity cost~~~饿总之我觉得题出得不好~~~~欢迎拍砖
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For answer C, it describes what happened to those manufacturers which start as independent suppliers first, NOT the independent supplier itself. And the stimuli has never mentioned that independent supplier that the company is looking for will become a manufacturer in future. This is considered as a shell game answer. It secretly changed the subject of the discussion to a similar but totally different one to confuse you.As for answer E, it can be logically assumed that when mgmt pays more attention to the core business, the profits generated from it could be increased and therefore it can boost the overall profit as well.
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you need an answer choice that shows that OUTSOURCING WILL BE MORE PROFITABLE THAN NOT OUTSOURCING. the other four answer choices are completely irrelevant to the issue, which is the effect of outsourcing on profit.. choice (e),E is best- It shows a precise advantage of implementing the plan! therefore, even though (e) requires additional assumptions, it's still the choice that &most strongly supports& the argument - because it's the only choice that even could support the argument.
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求达人帮忙看看,这道题该怎么做,要有过程哦,谢谢&
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大闹天宫及反对玉皇是孙悟空最具反抗精神的故事 大闹天宫时有一句名言,用来解释他造反的原因,叫做“强者为尊”。“美猴王”的得名就是一次“强者为尊”的实践。孙悟空的造反思想原来是有生活实践作基础的,这是《西游记》写得很高明的地方。再看看他为什么不安分,为什么要造反。小说描写孙悟空所生活的花果山、水帘洞,是一个“仙山福地”,在那里“不伏麒麟辖,不伏凤凰管,又不伏人间王位所拘束”,是一个“自由自在”的有“无量之福“的福地。也就是说,他本来是自由的,生活在一个自由天地之中,但他还要追求更大的自由,使他的个性得到更大张扬,更大的解放。他听说人的生死是由阎王管辖的,他就不服这个管辖。他周游四海,求仙访道,学习种种超人的本领,就是要达到追求更大自由的目的。大闹龙宫,他得到了一个“如意金箍棒”;大闹冥府,勾掉了生死簿,得了个长生不老。这些描写从全书的艺术构思上看,都是为后文写他护送唐僧到西天取经有无穷的本事作铺垫。但从艺术描写的思想意蕴看,又还具有另外一重意义,这就是通过这些情节,表现孙悟空追求自由和个性解放的思想性格。他在勾掉了生死簿上所有的猴属之类的名字以后,痛快淋漓地说:“了账!了账!今番不伏你管了!”这句简短的话可看作是孙悟空的造反宣言,传达出的,是一种带有时代特色的追求自由和个性解放的声音。作者对他神通广大的描写,也是具有值得注意的思想内涵的。他从菩提祖师学道,学得十万八千里的筋斗云,七十二般变化,后来又在东海龙宫获得一根重一万三千五百斤的如意金箍棒。(第二至第三回)他被二郎神捉住后,玉帝下命令送至斩妖台处死,结果是“绑在降妖柱上,刀砍斧剁,枪刺剑刳,莫想伤及其身。”火烧雷打也不能损他一根毫毛。(第七回)在太上老君的八卦炉里烧了七七四十九天,也没有把他烧成灰烬,相反却炼就了一双火眼金睛。大闹天宫时,十万天兵天将被他打得落花流水(第五至第六回)从八卦炉里逃出后,又“打得九曜星闭门闭户,四天王无影无踪。”在天宫内“东打西敌,更无一神可挡。”(第七回)写他如此神通广大,一则是为了后面写他护送唐僧到西天取经过程中斩妖除怪的斗争;二则也是为了写他有造反的资本,没有这样的神通广大就不可能成为强者,也就不可能产生“强者为尊”的思想。大闹天宫,集中表现了孙悟空蔑视皇权和反对封建等级观念的思想。天上的神权统治是人间的封建统治的投影。天界的最高统治者是玉皇大帝,可是孙悟空大闹天宫,根本不把他放在眼里。他自称是“天生圣人”,在闹了东海龙宫、搅了十王冥府以后,被告到玉帝那里去。玉帝在一般人和众神的心目中,都是一个十分尊严神圣、具有极大权威的最高统治者。太白金星一见就“朝上礼拜”,而孙悟空却“挺身在旁,且不朝礼。”玉帝问:“哪个是妖仙?”悟空应道:“老孙便是!”仙卿们听后大惊失色,吓得要死,认为对玉帝这般无礼,是“该死了!该死了!”(第四回)后来玉帝派天兵天将收服他,被他打败,被迫承认他是“齐天大圣”;他第二次见玉帝时,也不跪拜,“亦只朝上唱个喏,道声谢恩。”(第四回)天宫中星相群神的森严等级,他一概都不承认,而是“不论高低”,“俱以弟兄相待”,“俱称朋友”。(第五回)天宫里也如世俗世界,讲究尊卑秩序,等级观念是非常严格的。因为他的级别不够,西王母的蟠桃会就没有请他,他于是大为不满,偷吃了仙桃,偷吃了仙酒、仙品,又偷吃了太上老君的金丹,把天宫中尊卑上下的秩序搅得一塌糊涂。玉帝无法可想,搬来如来佛收伏他。如来问他为什么要造反,“要夺玉皇大帝的尊位?”他理直气壮、意气高昂地回答道:“因在凡间嫌地窄,立心端要住瑶天。……强者为尊该让我,英雄自此敢争先。”并说:“常言道:‘皇帝轮流坐,明年到我家。’只教他搬出去,将天宫让与我,便罢了;若还不让,定要搅攘,永不清平!”(第七回)玉帝要将他处死,罪名就是“只为心高图罔极,不分上下乱规箴。”(第七回)意思是指他目无皇权,破坏君臣之礼,搅乱了上下尊卑的秩序。就是在被如来收服,皈依佛门,保护唐僧去西天取经的时候,对玉帝、如来、老君等神佛道世界中的统治者也是很不恭敬的,见面时以“老官儿”称呼,“唱个喏”,自称为“老孙”。第三十三回写他向玉帝借天,说“若道半声不肯,即上灵霄殿,动起刀兵!”他在斗争中发现兕牛怪原来是太上老君身边的一头青牛下凡,就去向玉帝和老君问罪,斥责他们“钳束不严”,“纵放怪物”。在封建专制时代,皇帝是最高权力的代表,是神圣不可侵犯的,而且是天意所定,不能违背,而孙悟空却根本不把这些放在眼里,表现了极强的叛逆性和反抗精神。在这里,我们看到了孙悟空的叛逆性格和造反精神,同明代中后期进步的的时代思潮之间深刻的内在联系。首先是“强者为尊”的思想。“强者为尊”的思想是同封建等级观念相对立的,特别是同以天命论和血统论为基础的君权神授的封建专制思想相对立的,这明显地是带有新的时代特色的市民意识的表现。在商业资本发展过程中,新兴的市民阶层为了挣脱封建秩序的束缚,就要求凭借自己的能力和努力来求得发展,企图打破原有的等级和秩序。孙悟空的思想性格无疑反映了这样的时代要求。因为他有一身广大的神通,认为自己是强者,所以就要夺取玉帝的宝座,喊出“皇帝轮流坐,明年到我家”的口号。而他后来的屈服于如来,又是因为经过较量,他成为相对的弱者。不过就是在被收服以后,在取经路上,那“强者为尊”的意识也仍然时时显露出来。其次是与此相联系的“尊贤”的思想。他不能忍受屈辱,要求对人和对人的才能的尊重。他自认自己的能力很高,因而要求玉帝要给予他与他的能力相应的位置。他两次造反,第一次是因为玉皇只让他当了个“弼马温”,开始还很高兴,当他明白了这不过是一个喂马的小官以后,就十分不满,认为皇帝昏庸,“轻贤”、“不会用人”。他对前去收服他的巨灵神说:“他甚不用贤!老孙有无穷的本事,为何让我替他养马?你看我这旌旗上字号。若依此字号升官,我就不动刀兵,自然的天地清泰;如若不依时间,就打上灵霄殿,教他龙床定坐不成!”当玉皇封他做“齐天大圣”后,他就“遂心满意,喜地欢天,在于天宫快乐,无挂无碍。”而当西王母的蟠桃会没有邀请他时,他又感到受了屈辱,于是又起来
可不可以符合我们的水平
可以稍微修改一下
发一下可以不
家四个字,大闹天宫
不好意思啊,姐姐困了,明天还得上学呢
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