As we all known, with the founding of Euclidean geometry in ancient Greece, with the development of analytic geometry and other kinds of geometries, with F.Kline" s Erlanger program in 1872 and the new developments of geometry in 20th century such as topology and so on, man has developed their understand of geometry. On the other hand, Euclid formed geometry as a deductive system by using axiomatic theory for the first time. The content and method of geometry have dramatically changed, but the geometry curriculum has not changed correspondingly until the first strike from Kline and Perry" s appealing.

縱觀幾何學發(fā)展的歷史，可以稱得上波瀾壯闊：一方面国产黄片精品a片3p，從古希臘時代的歐氏綜合幾何，到近代解析幾何等多種幾何的發(fā)展迷奸视频网站，以及用變換的方法處理幾何的埃爾朗根綱領(lǐng)天堂网av资源www，到20世紀拓撲學美女免费黄色网站a、高維空間理論等幾何學的新發(fā)展，這一切都在不斷豐富人們對幾何學的認識黄片、com好吊操视频；另一方面A级毛片不卡免费视频观看，從歐幾里得第一次使用公理化方法把幾何學組織成一個邏輯演繹體系，到羅巴切夫斯基非歐幾何的發(fā)現(xiàn)自拍偷拍15，以及希爾伯特形式公理體系的建立无码AV天堂一区二区，極大地發(fā)展了公理化思想方法，不管是幾何學的內(nèi)容還是方法都發(fā)生了質(zhì)的飛躍欧美精品一区二区观看。

In addition, you can use the fluid acoustics application modes with 1D and 1D axisymmetric geometries.

此外性交配视频网站35，您可以使用液體聲學應用模型的1D和1D軸對稱幾何體。

It isconfirmed by ~1H NMR,~(13)C NMR and X-ray crystallographic analysis that complexes 60-63are monopyridine complexes and show distorted square pyramid geometries; complexes 64and 65 are bispyridine complexes and show pseudo-octahedral geometries, where twopyridine ligands are in cis arrangement and trans to the NHC and the benzylidene ligandrespectively, the bond length between ruthenium and pyridine ligand trans to the benzylideneligand is 16 pm longer than the bond length between ruthenium and pyridine ligand trans tothe NHC ligand.

1H NMR99超碰免费、~(13)C NMR及X射線單晶衍射分析證明操操射射，配合物60-63是單吡啶衍生物配位的釕卡賓配合物，具有變形的四方錐構(gòu)型一本道在线免费观看无码一区二区；配合物64国产精品久久久久高、65為雙吡啶衍生物配位的釕卡賓配合物，具有變形的八面體構(gòu)型亚洲精品永久中文字幕，其中兩個順式配位的吡啶衍生物分別處于氮雜環(huán)卡賓和苯亞甲基的反位操屄视，處于苯亞甲基反位的吡啶衍生物對應的釕-氮鍵長要比處于氮雜環(huán)卡賓反位的長出16 pm。

The metal ions of the dinuclear copper complex of [Cu_2_2Cl_4] are linked by two N~1,N~2 1,2,4-triazole bridges,and the central Cu ions have distorted trigonal bipyramid geometries. The central Cu ion of [CuL22]·H2O has a centrosymmetric and distorted tetragonal-octahedral geometry. The metal ions of the dinuclear manganese complex of [Mn_2L_2_2Cl_2(H_2O)_2] are bridged by two chlorine atoms, and the central Mn ions have distorted tetragonal-octahedral geometries. Part III.

配合物[Cu_2_2Cl_4]是通過配體L的199riav黄片国产免费，2青草不雅三级在线观看，4-三唑環(huán)上兩個氮原子(N~1，N~2)橋聯(lián)形成的雙橋雙核配合物又粗又大又长又硬起来了，每個中心銅離子都具有畸變的三角雙錐構(gòu)型国产国产成年年人免费看片；配合物[CuL22]·H_2O的中心銅離子具有中心對稱的畸變八面體構(gòu)型；配合物[Mn2L2_2Cl_2(H_2O)2]是通過兩個氯原子橋聯(lián)形成的雙橋雙核配合物欧美三级高清在线，每個中心錳離子都具有畸變的八面體構(gòu)型狼友视频在线免费。

Nearly-degenerate A1 and B1(C2y) electronic states are found with distorted trigonal bipyramid and edge-capped tetrahedral geometries together with a E'(D3h) state for Ga3P2.while a distorted structure with 2B1 symmetry and a 2a2 undistorted D3h structure are found to be nearly-degenerate for Ga2P3 .we employ the complete active space multi-configuration self-consistent field followed by multi-reference singles + doubles configuration interaction computations that included up to 2.5 million configurations.

近退化A1和B1 (C2y)電子狀態(tài)找到與被變形的三角bipyramid，并且邊緣加蓋的四面體geometries與一個E' (D3h)狀態(tài)一起為Ga3P2.while一個被變形的結(jié)構(gòu)與2B1對稱和2a 2未變形的D3h結(jié)構(gòu)被發(fā)現(xiàn)近退化的為Ga2P3 AAAAAAAAA性关系视频。we使用自洽場被多參考跟隨選拔+雙配置互作用的完全活躍空間多配置計算包括2.5百萬種配置在线污网站。

Through the manipulation of geometries and coruscating colour, the temporary gallery is transformed into a surreal, dynamic environment.

通過geometries 和coruscating 的顏色的操作，臨時畫廊被變換成一個超現(xiàn)實欧美性爱直播，動態(tài)環(huán)境婷婷五月综合800。

The research of another special case of-geometries -semipartial geometries is very active in recent 10 years.

對-幾何的另一種特殊情形-半偏幾何的研究，是近10年活躍在幾何界的重要課題igao日韩无码。

Problems often involve impossible or degenerate geometries, which may be the result of a bad numerical calculation.

問題常常涉及不可能的或者退化的geometries免费涩涩在线视频网，那樣可能是錯誤的數(shù)字計算的結(jié)果。

Currently, theories of partial geometries are abundant, while that of general-geometries are much fewer.

目前關(guān)于偏幾何的理論已經(jīng)非常豐富，但關(guān)于一般的-幾何的結(jié)果卻少得多美国一级牲交黑大粗硬大片学校。

"Now engineers can think of an idea, print it, hold it in their hand, share it with other people, change it and go back and print another one," says David Reis, the chief executive of Objet Geometries, an Israeli firm that makes 3-D printers.

&現(xiàn)在工程師們可以在有想法后亚洲欧洲国产码专区在线男男，把它打印出來，拿在手里和其他人分享自己的想法欧美一级爽爽爽www，改變想法欧美另类激情视频在线观看，然后回去在打印一個，&以色列3-D打印機制造公司Objet Geometries的主管大衛(wèi)﹒雷斯說官产在线免费观看无码。