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Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.
采用"一勺烩"方法,以4-羟基苯甲腈为起始原料,首先与硫氢化钠和无水氯化镁在N,N-二甲基甲酰胺中反应,所得中间体不经分离,直接加入2-氯乙酰乙酸乙酯进行环合反应,得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(2);然后通过六亚甲基四胺/三氟乙酸进行Duff反应,得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯(3);再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。
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In this paper, we firstly introduce" Bertrand paradox", then by improved Hotelling model, explain rationally" Bertrand paradox", then we define oligarch's advantage cost, offer each oligarch's perfect positioning strategy under differential cost.
本文首先介绍了伯川德悖论,接着利用改进的霍特林模型,对著名的"伯川德悖论"进行了合理的解释,定义了寡头的成本优势,给出了具有不同成本优势的情况下,不同寡头的最优定位纯策略和各自的最优利润。
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Referred Sitemap then, robots, do not go out two days, site name that saw oneself with respect to suddenly suddenly, '' of be beside oneself just is ranked very not ideal, remember then should do appropriately some optimize, change home page static state, the title that added the page inside Meta; changed child caption---Advocate caption, turn Tags into Keywords.
接着提交了sitemap,robots,不出两日,site了一下就恍恍看到了自己的名字,忘形'' 只是排名不甚理想,于是想起要适当做些优化,将首页静态化,添加了meta;内页的标题都改成了子标题---主标题,将tags转成keywords。
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In this paper, firstly, the embeddability of near-triangular graphs on the orientable surface is studied. By using Petersen's Theorem about 1-factor, we first prove that for a near-triangulation on the orientable surface, its geometry dual graph has a 1-factor; then after a procedure of operation leaded by the 1-factor, we show that if a graph G triangulates some orientable surface S_g, then G has a near-triangular embedding in S_h for h = g,g + 1,...,β(G/2」, where β is the Betti number of G. Hence we obtain a conclusion: A near-triangulation of the orientable surface is upper-embeddable. As a generalization, a class of near-quadrangulation is studied, and similar results are obtained.
本文首先研究了近三角剖分图的可定向曲面嵌入性质,通过运用Petersen关于1-因子的定理,首先证明了对于可定向曲面上的三角剖分图,其几何对偶图具有1-因子;然后在1-因子的导向下,通过做一系列增加亏格的手术,证明了如果一个图G三角剖分可定向曲面S_g,那么G可以近三角剖分可定向曲面S_h,这里h=g,g+1,…,「β(G/2」,β是指图G的Betti数,从而得出推论:可定向曲面上的三角剖分图是上可嵌入的,作为推广,又研究了一类近四角剖分图的可定向曲面嵌入性质,并得到类似的结论。
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In "the Fine Li Younger sister" in this work, fine Li is a pure attractive countryside girl, because yearned for the big city the lively life as well as each kind of countryside are unable the joy which hopes to attain or equal, then comes to Chicago to go to the elder sister, when receives the cold reception in the elder sister family, because of got sick lost when the livelihood pain not helped, then successively and German fatigue Egypt and 赫斯特 Wood lives together, achieved the different level by this method the material demand, but afterwards in did not need their time but them gets rid.
刚才忘记把翻译内容发出来了我已经没积分了谁帮我把这个翻译后,然后再在我提问过的那个里面回答下,我就把积分都给你。简要内容:在《嘉莉妹妹》这部作品中,嘉莉是一个纯真漂亮的农村姑娘,因向往大城市的繁华的生活以及各种农村无法企及的快乐,便来到芝加哥投奔姐姐,当在姐姐家受到冷遇,因病而丢失了生计痛苦无助时,便先后与德劳埃和赫斯特伍德同居,以此种手段来达到不同层次的物质需求,而随后又在不需要他们的时候而把他们抛弃。
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Fine Li is a countryside girl, because yearned for the big city the life as well as each kind then come to Chicago to go to the elder sister, when receives the cold reception in the elder sister family, because of got sick lost when the livelihood pain not helped, then successively and German fatigue Egypt and 赫斯特 Wood lives together, to this achieved the different level the material demand, but afterwards in did not need their time but them gets rid.
今天急用,望高手帮助。不要电脑直译那种问题补充:简要内容:嘉莉是一个农村姑娘,因向往大城市的生活以及各种便来到芝加哥投奔姐姐,当在姐姐家受到冷遇,因病而丢失了生计痛苦无助时,便先后与德劳埃和赫斯特伍德同居,以此达到不同层次的物质需求,而随后又在不需要他们的时候而把他们抛弃。
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Ball and Rose Routine: A white rose is plucked from it抯 stem and turns into a white billiard ball, which vanishes and is reproduced as a silk scarf is waved in front of it. There are several more vanishes and reappearances, then the ball changes color. The new red ball now becomes white then red and continues to change several more times.
如果你还没有遇到过有人能控制你的心灵时候,你将会觉得这是不可思议的,现在Derren Brown将会现你证明这个超能力,控制你的想法,这里,他将会在第四频道的一个小节目中证明如何让你压抑住的兴趣表现出来,你放心,这不纯在手法上的问题,因为那是很难在那么多的观中注视中不出现麻烦的。
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Concretely, starting from a short sequence primal masks possessing Hermite interpolation properties, a necessary and sufficient conditions such that primal masks satisfies the preassigned order of sum rules are established, then a dual masks with short support, symmetry and any preassigned order of sum rules is constructed, it follows that two multiscaling functions are obtained and then multiwavelets and dual multiwavelets are derived. From which, a general design framework is obtained for constructing biorthogonal multiwavelets system with multiplicity 2r associated with Hermite interpolation functions.
具体的,从具有Hermite插值性质的短序列尺度符号出发,首先建立它具有指定阶和规则的充要条件,然后构造出短支撑、对称的具有指定阶和规则的对偶尺度符号,从而得到一对对偶的尺度函数,再构造出相应的双正交多小波。
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Harry and Hermione and Ron are talking about Lupin, I think, and then they blabber on and on about Scabbers, and then everything freezes up when Ron's hand is on the window.
Harry和Hermione和Ron正在谈论Lupin,我认为,他们胡乱说着关于Scabber的事情,然后一切都冻结了,此时Ron的手放在了窗子上面。
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She said,"I was very amused" I started throwin' bass, she started throwin' back mid-range But when I sprung the question, she acted kind of strange Then when I asked,"Do ya have a man," she tried to pretend She said,"No I don't, I only have a friend" Come on, I'm not even goin' for it This is what I'm goin' sing You, you got what I need but you say he's just a friend And you say he's just a friend, oh baby You, you got what I need but you say he's just a friend But you say he's just a friend, oh baby You, you got what I need but you say he's just a friend But you say he's just a friend So I took blah-blah's word for it at this time I thought just havin' a friend couldn't be no crime 'Cause I have friends and that's a fact Like Agnes, Agatha, Germaine, and Jacq Forget about that, let's go into the story About a girl named blah-blah-blah that adored me So we started talkin', getttin' familiar Spendin' a lot of time so we can build up A relationship or some undderstanding How it's gonna be in the future we was plannin' Everything sounded so dandy and sweet I had no idea I was in for a treat After this was established, everything was cool The tour was over and she went back to school I called every day to see how she was doin' Everytime that I ccalled her it seemed somethin' was brewin' I called her on my dime, picked up, and then I called again I said,"Yo, who was that?"
她说: "我感到非常好笑"我开始投掷'低音,她开始投掷'回到中间范围但当我,涌现出了问题时,她充当种奇怪那么,当我问他:"做雅有一名男子,"她试着假装她说:"不,我不,我只是有一个朋友"来,我什至还不算goin ',为它这就是我goin '唱你,你明白我的需要,但你说他只是朋友你说他是一个朋友,哦宝宝你,你明白我的需要,但你说他只是朋友但你说他是一个朋友,哦宝宝你,你明白我的需要,但你说他只是朋友但你说他只是朋友所以,我接拍了怎么-怎么的字,因为它在这个时候我以为只是havin '朋友不能没有犯罪'事业,我的朋友,这是一个事实如王春波, agatha , germaine , jacq 忘记一点,让我们走进故事约一个女孩名叫怎么-怎么-怎么说,我喜欢所以,我们开始talkin ', getttin '熟悉 spendin '了很多时间,使我们能够建立关系或某些undderstanding 它如何的好的,在未来,我们是plannin '一切听起来那么慰问和甜我都不知道我是一个对待经过这次成立时,一切都冷静巡回赛结束,她回到了学校我打电话,每天看到她是如何被doin '每当我ccalled她,这似乎somethin ',是蒲鲁贤'我打电话给她,我一分钱,拾起,然后,我再次呼吁我说,"协青社,他们是"?
- 相关中文对照歌词
- Maybe Then Someday
- Then She Cried
- Then Came The Night
- Then I Wake Up
- Then They Do
- Then We Remember
- Every Now And Then
- Then Was Then And Now Is Now
- And Then Came Then
- Then And Only Then
- 推荐网络例句
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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether
年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。
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Eph. 4:23 And that you be renewed in the spirit of your mind
弗四23 而在你们心思的灵里得以更新
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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.
老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。