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目的探讨足三里穴位按摩联合腹部抚触对早产儿喂养不耐受(feeding intolerance, FI)的影响。方法将符合入选标准的2018年1月-2020......
题目（2018濱州）如图1，在矩形ABCD中，AB=2，BC=4，点E、F分别在BC、CD上，若AE=5，∠EAF=45°，则AF的长为.......
1.如图，AB是圆O的直径，D，E为圆上位于AB异侧的两点，连结BD并延长至点C，使BD=DC，连结AC，AE，DE.求证：∠E=∠C.......
Insights into the adsorption/desorption of CO_(2) and CO on single-atom Fe-nitrogen-graphene catalys
Single-atom metal-nitrogen-graphene(M-N-Gra) catalysts are promising materials for electrocatalytic CO2 reduction reacti......
Evolution and Development of the Information Concept in Biological Systems: From Empirical Descripti
With the purpose to smooth the way of a correct understanding of information concepts and their evolution,in this paper,......
The effective elimination of sound energy traveling in open ducts is critical in acoustics,with considerable potential i......
教育现代化是改革开放以来教育改革发展的鲜明主题，经历了从1983年“面向现代化”到党的十七大“提高现代化水平”，再到党的十九大“......
Comparison of the Digestion and Absorption Characteristics of Docosahexaenoic Acid-Acylated Astaxant
Docosahexaenoic acid-acylated astaxanthin(DHA-AST)esters exhibit distinct bioactivities in improving brain function.Howe......
(a+b)/2≥ab~(1/2)2/(1/a+1/b)(a>0,b>0)是平均数不等式——“算术平均最大,几何平均次之,调合平均最小”的最简单的情形。它有许......
同学们,在初中学习中,有一些物理题,特别是求极值问题,若用a+b≥2ab~(1/2),(a≥0,6≥0)来解决,比配方法,二次函数法等更方便,更快......
ab±cd=ef型命题在中考中分量较大,一般与圆的条件给出,证明方法主要以三角形相似和有关圆的线段定理为推证依据。下面就将这类题......
逻辑划分在几何的常规题中也有广泛的应用.下面补充几例供研究与讨论. 例1在△ABC中,AB、AC边上的高分别为CE、BF,E、F分别为垂足,......
在平方差公式x2-y2=(x+y)(x-y)中,令x=(a+b)/2,y=(a-b)/2,便可得到公式ab=(a+b/2)2-(a-b/2)2,运用此公式,可巧解国内外一组竞赛题......
Combination therapy with peginterferon (pegIFN)-α and ribavirin (RBV) has been the standard of care (SOC) for chronic h......
平面向量中,将方向相同或相反的非零向量定义为平行向量,平行向量也叫做共线向量.也就是说平面几何中的“平行线段(直线)、共线线......
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Please download and view, this article does not support online access to vie......
设a,b∈R~+且a>b,讨论并比较a/b与a+2b/a+b的大小。原题中含有两个变元a、b,为使问题化繁为简,引进新的变元t,且令t=a/b,显然有t>......
我们知道,((a~2+b~2)/2)~(1/2)、(a+b)/2、(ab)~(1/2)、2/(1/a+1/b)(a>0、b>0)分别为a、b的平方平均数、算术平均数,几何平均数、......
提出一种获取染料光吸收和散射系数的新方法，较之国际现行的主加贝尔卡－芒克（Ｋ－Ｍ）法更有效地消除了在实际测量中，由于存在着透射和界面内，外......
Ab initio calculation is carried out to study the different supposed mechanisms of DNA base alkylation by [β-sulphate-n......
Different gas adsorption isotherm experiments were carried out on the coal samples from Jincheng district, including N2,......
a+b/2>(ab)~(1/2)作为最基本的不等式,其最常规的代数证明法已为人们所熟知,是否有其他的证明方法或技巧呢?在通过一定的研究后,......
本文主要介绍哈尔滨至大连客运专线路基AB组填料施工工艺。
This article mainly introduces Harbin-Dalian Passenger Dedicated......
针对吸收马尔可夫随机游走方法未能充分抑制显著图的中心背景区域和丢失位于图像边界的显著目标的问题,提出一种基于流形正则化随......
The theoretical study of reaction between PH2 and NO on the ground state potential energy surface is reported by using m......
