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Using affine coordinate transformation,we simplifytogether the system and the curve.

我们得到了一批关于极限环存在性的便于应用的结果。

It consists of the next three aspects: firstly, we study Murthys' open problem whether the augmented matrix is a Q0-matrix for an arbitary square matrix A , provide an affirmable answer to this problem , obtain the augmented matrix of a sufficient matrix is a sufficient matrix and prove the Graves algorithm can be used to solve linear complementarity problem with bisymmetry Po-matrices; Secondly, we study Murthys' conjecture about positive semidefinite matrices and provide some sufficient conditions such that a matrix is a positive semidefinite matrix, we also study Pang's conjecture , obtain two conditions when R0-matrices and Q-matrices are equivelent and some properties about E0 ∩ Q-matrices; Lastly, we give a counterexample to prove Danao's conjecture that if A is a Po-matrix, A ∈ E' A ∈ P1* is false, point out some mistakes of Murthys in [20] , obtain when n = 2 or 3, A ∈ E' A ∈ P1*, i.e.

本文分为三个部分，主要研究了线性互补问题的几个相关的公开问题以及猜想：(1)研究了Murthy等在[2]中提出的公开问题，即对任意的矩阵A，其扩充矩阵是否为Q_0-矩阵，给出了肯定的回答，得到充分矩阵的扩充矩阵是充分矩阵，并讨论了Graves算法，证明了若A是双对称的P_0-矩阵时，LCP可由Graves算法给出；(2)研究了Murthy等在[6]中提出关于半正定矩阵的猜想，给出了半正定矩阵的一些充分条件，并研究了Pang~-猜想，得到了只R_0-矩阵与Q-矩阵的二个等价条件，以及E_0∩Q-矩阵的一些性质；(3)研究了Danao在[25]中提出的Danao猜想，即，若A为P_0-矩阵，则，我们给出了反例证明了此猜想当n≥4时不成立，指出了Murthy等在[20]中的一些错误，得到n=2，3时，即[25]中定理3.2中A∈P_0的条件可以去掉。

President Bush has responded affirmatively to a request from Kosovo to establish diplomatic relations between our two countries.

布什总统已经同意了科索沃关于美科两国建立外交关系的请求。

On affixation of English words, it is generally acknowledged that suffixes frequently alter the word class of the base, and that prefixes generally don t.

关于缀合法构词，一些词汇学方面的书籍探讨了后缀对词根的词性的影响，而对前缀在这方面的影响研究不详。

President Barack Obama will not accept any of the Afghan war options presented to him.

奥巴马总统表示不会接受任何提交给他的关于阿富汗战争的建议。

Of or relating to or characteristic of Afghanistan or its people.

属于或关于阿富汗、阿富汗人的，或有其特点的。

Drug companies give these and public studies to the afore drug administration for a approve of the medicines.

制药公司提供这些报告以及公布的研究结果关于这些药物来自食品和药物管理方面的许可证。

This is a book on South Africa.

这是一本关于南非的书。

Either of two very large herbivorous mammals,Elephas maximus of south - central Asia or Loxodonta africana of Africa,having thick,almost hairless skin,a long,flexible,prehensile trunk,upper incisors forming long,curved tusks of ivory,and,in the African species,large,fan - shaped ears.

象两种巨大的食草哺乳动物，中南亚的象属或者非洲的非洲象属中的一种，皮肤坚厚，无毛，长有一条长的柔韧的可以卷曲的鼻子，上颚二门齿发展为长而弯的象牙。非洲象属有巨大的扇形状的耳朵到中国译典经典版本中查找关于hairless的最新解释和例句。。。。

An ancient legend says the ethereal tablecloth is due to an old Afrikaner called Van Hunks who sits on Devil's Peak having a smoking contest with the devil himself.

关于这些飘渺的桌布的来历有一个古老的传说：一个名叫范汉？

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。