简介：摘要：“有+V+N1+自+N2”结构是甲骨卜辞中的一种特殊语法现象，学界对其结构的判定一直争论不断。本文从“V+N1”的结构和“自+N2”的语义指向两个方面进行阐述，以此来论证甲骨卜辞中的“有+V+N1+自+N2”结构为存现动词“有”搭配谓词性宾语的典型用法。在“有+V+N1+自+N2”结构中，“有”是谓语中心，“V+N1+自+N2”作“有”的宾语，“N1”实为“V”的宾语，“自+N2”为“V”的补语。

简介：运用Lagrange级数展开法,获得了三角级数S_m(n)=sumfromk=1to2kncos~m(2kπ)/(2n+1)的求和公式1,主要结果本文借助于Lagrange级数展开法获得了下列结论:定理:设S_m(n)=sumfromk=1toncos~m(2kπ)/(2n+1),则有这里m为自然数,[x]表示x的最大整数部分,(?)为二项式系数

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简介：不听话的数学题这周末两天怎么过得这么快，一眨眼就过去了!可童彤的数学作业还空着两大计算题呢。一放下晚餐的筷子，他便三下五除二做完了。可当他再瞄一眼时，发现自己在解方程去分母时，慌里慌张算错了。“哎，以下全白忙乎了。”他急急拿起橡皮擦，没两下就把作业纸给擦破了。这下，童彤烦了，把橡皮擦往墙角一扔，一道弧线。还没容他眨眼，墙角冒出一缕青烟。

简介：自从NECN8凭借着65536色的高品质TFT屏幕初入彩屏机市场，NEC的手机就一直保持住了屏幕领先的地位。而其浓厚的日式的手机风格，也在国内市场中独树一帜，也有着一定数量的簇拥者。这次向大家介绍的NEC最新款N820则把日式手机的特色演绎到了一个新的高度。

简介：AbstractObjective:The prevalence of midline birth defects, such as gastroschisis, has increased worldwide, over the last few decades. This study aims to explore the prevalence, maternal epidemiological characteristics, and natural history of neonates affected by gastroschisis at the University Hospital of León city, Nicaragua.Methods:Data were collected from the birth defect surveillance system of the Hospital Oscar Danilo Rosales (HEODRA). The analysis included all pregnancies that had gastroschisis complications between January 1 and December 31, 2020. The prevalence of gastroschisis was calculated according to maternal age. The mothers were interviewed, and the clinical records of the newborns were reviewed.Results:Among the 4,460 deliveries included in this study, four cases of gastroschisis were identified, including three live births and one stillbirth. The gastroschisis rate was 8.9 per 10,000 live births (95% confidence interval [CI]: 0.18-17.8). The prevalence among mothers younger than 20 years and those older than 20 years was 26.4 (95% CI: -3.43 to 56.25) and 3.01 (95% CI: 2.89-8.90)/10,000 births, respectively. Mothers of gastroschisis-affected fetuses were of rural origin (n = 3), had normal body mass indexes (n = 3), were exposed to tobacco and wood smoke (n = 2), and one was exposed to pesticides during the periconceptional period. Primary closure of the gastroschisis was performed on one patient, and complex gastroschisis for intestinal perforation was observed in another patient. The mean hospitalization duration was 33 days, and two patients were discharged alive.Conclusions:Gastroschisis was a significant birth defect among children delivered at HEODRA in 2020. Its prevalence in Nicaragua was higher than that in other countries in the region. All complicated pregnancies were young women with unplanned pregnancies, from rural areas, with exposure to secondhand smoke, and without vitamin supplements before or during the first trimester of pregnancy. Only 67% of infants survived after hospital discharge.

简介：食人花真的存在吗？蘑菇也能当武器吗？世界上最短命的种子是什么？总在同一棵树下尿尿,树会死吗？一次性筷子能毁灭地球吗？原来除了动物之外,植物也隐藏着深奥的科学知识。生活在地球上的植物,究竟拥有多少不为人知的秘密？翻开《大豆的N种死法》,你会有很多意想不到的发现。这一次,让我们跟随果壳科学达人们生动幽默、妙趣横生的文字．去揭开植物世界的奥秘，一起来大嚼科学吧!

简介：小明家厨房蚂蚁成灾,于是他向同学们求助,同学们想出来的一些灭蚁办法,读后令人捧腹大笑.如果你有消灭蚂蚁的高招,请来信告诉我吧!别忘了,随信把答题卡一起寄来哦!

简介：Hey,guys!来聊一聊接下来想干的事儿吧!You’rebusy？不用花费很多时间。你要做的。只是听我们说完（哪怕你觉得这真的只是个“白日梦”），再积极地回应，并毫不吝啬地给予肯定。毕竟——“梦想总是要有的。万一实现了呢？”

简介：细节决定成败.创办一年来,历经风雨,屡见彩虹,有无数个细节,如人体的关节一样,环环相扣,紧密结合,把身上的各个部位联成一体,生成活力,支撑了自身应负的责任.值出刊周岁来临之际,特录主编该刊一年来所见所闻的N个细节,聊备案头,记录成长.

简介：Itisknownfromclassicaldifferentialgeometrythatonecanreconstructacurvewith(n-1)prescribedcurvaturefunctions,ifthesefunctionscanbedifferentiatedacertainnumberoftimesintheusualsenseandifthefirst(n-2)functionsarestrictlypositive.ItisestablishedherethatthisresultstillholdsundertheassumptionthatthecurvaturefunctionsbelongtosomeSobolevspaces,byusingthenotionofderivativeinthedistributionalsense.ItisalsoshownthatthemappingwhichassociateswithsuchprescribedcurvaturefunctionsthereconstructedcurveisofclassC∞.

简介：什么样的企业才能拿到未来商业奥林匹克的入场券？请对照以下刻度，审视自己的商业模式。如果一项指标也未达到，那么你的公司危矣——不管它现在看起来如何强大，都难以承受将来的冲击。

简介：一首首慷慨激昂的乐曲、一个个纯真质朴的故事、一张张精彩瞬间的相片。迎看火红的朝阳，踏看红色的足迹，每一天都是崭新的。

简介：熟知NECN910手机的朋友一定知道N910最吸引MM的就是它那小巧玲珑，如粉盒般的外表，而对于NEC来说，这一精髓之处自然不会舍弃，所以N916的57mm×52mm×20.2mm三维尺寸和74克的机身重量，让N916成为了N910的继任者。作为MM专用机的继任者，其外观较之N910更加的精致，并且线条也更加的柔和，甚至连外置天线都是同样的设计风格，而不像N910那样的棱角分明。

简介：你曾为看不清老师在黑板上的板书而烦恼过吗?你曾为丢失了课本或作业本而焦虑过吗?你曾为不能在课堂上和老师即时交流而遗憾过吗?……为了解决上述种种问题,英国的科研人员把电脑与课桌相结合,研制

简介：同学们，你一定知道写日记的好处吧!的确，坚持写日记，是积累素材和练笔再好不过的机会了。可是，时间一长，又觉得没米下锅，超级窘迫，哎!日记成了几乎想放弃的“鸡肋”啦!其实，只要作者有一颗热爱生活的诚心，加上表达生活的慧心，再学一些小窍门，还是会大功告成的。面对需要天天变化的日记，你必须练出几手相应的变换招术才行，这样，写起日记来既轻松又快乐。

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简介：数年前，台湾光头明星凌峰先生在中央电视台春节晚会上幽默诙谐的表演，倾倒了无数观众；笔者还特别注意到了凌先生那句“超常搭配”的台词：“我的长相很中国。”之后，《语文世界》1994年第9期刊登李芳杰先生《“很”字用法不当举例》，

简介：“肉价不如菜价”，目前行业的困境显而易见，很多人都感到一筹莫展。逃离行业大可不必，但在痛苦坚守的同时如何尽快走出困境却是一个很现实的问题。那么，如何走出困境呢？这是一个仁者见仁、智者见智的问题，我们观察和总结了大家时下的一些做法，大致有以下几种：