四

During the study of flexible structure design of EKM, chapter four proposes a structure design model of EKM based on selectionism and a model of maximizing knowledge diversity of project team.

从柔性的四个维度与知识管理的四个主要过程形成的坐标区块入手，第四章分别研究提高EKMS柔性的企业文化、组织结构的特点。

However,the professional knowledge...dont even want to say. i spent 4 years to find out what i want but that s the best time i should spent on chasing dreams. soso said, i didnt study at the beginning we entered the school and most of our fellows were like that.

无可奉告。我用四年的时间才看的清楚我自己想要的是什么，但这四年却是最应奋斗的四年。soso说，仿佛一进这间学校就没有读过书，好像师兄师姐都是这样的。

Department of Anesthesiology, Stomatological College, Fourth Military Medical University, Xi＇an 710038 CHINA

第四军医大学唐都医院麻醉科，陕西省西安市710032 [2]第四军医大学口腔医学院麻醉科 [3]第四军医大学西京医院放射科

So far, nsLTP was proposed to promote the spreading of systemic acquired resistance signal in arabidopsis, and induce the adhesion of the pollen tube to an artificial stylar matrix in vitro, suggesting a receptor-like molecule likely exists in the cell membranes.

三级结构主要由四个α-螺旋组成，四个α-螺旋由四对二硫键相连，形成一个能结合各种脂质分子的疏水性孔穴。

In the photopolymerization system of AN initiated by AQ and P , the polymerization rates sensitized by addition of carbon tetrabromide to AQ or P are much higher than that of AQ or P alone.

当在AQ引发的AN光聚合体系中，加入四溴化碳后，聚合速率明显加快，所得聚合物特性粘度低于不加四溴化碳的产物，证明四溴化碳与AQ在光照射下，形成激基复合物，参与了引发反应。

It is discussed that how the preparation methods of the catalyst for trichloroethylene by dehydrochlorination from tetrachloroethane ,the reactor materials,ferric chloride,the impurity 1,1,2-trichloroethane and the high boilers contained in raw material tetrachloroethane and the operating conditions influence the catalyst.

探讨了四氯乙烷脱氯化氢制三氯乙烯所用催化剂的制备方法、反应器材质、氯化铁、原料四氯乙烷中的杂质1，1，2-三氯乙烷和高沸物及操作条件对催化剂的影响，从而指导四氯乙烷脱氯化氢制三氯乙烯的工业生产，提高催化剂的效率，延长催化剂的寿命，消除不利的影响因素，提高产品质量，降低生产成本，确保三氯乙烯生产的长期、稳定运行。

Diaminoalkanes react with sym - tetrachloroethane to give crystaline 2,2'- Bis -( hexahydropy-rimidine) derivatives 1 - 5, after treatment with aqua ammonia.

利用均四氯乙烷及二氯甲烷的胺化反应，合成了联氢化嘧啶衍生物1～5，4a，8b-反-4，5，8a，9a-四氮杂全氢芴(6)和8b，8c-顺-3a，4a，7a，8a-四氮杂环戊并全氢芴(7)。

The structure models of zirconium sulfate tetrahydrate and silica have been built. The binding morphology, charge distribution and energy change were also studied. It is deduced that the strong interactions between the active composition and support through hydrogen binding and dehydrate mode promise that zirconium sulfate tetrahydrate can disperse uniformly on the surface of support.

在对硅胶表面结构单元和四水硫酸锆单体空间模型结构参数进行优化的基础上，依据四水硫酸锆与硅胶载体表面的成键状态、电荷布居及能量变化，从理论上分析了四水硫酸锆与载体表面之间静电和脱水的相互作用的合理模型及硅胶负载型硫酸锆的结构稳定性，阐明了硫酸锆在载体表面的分散趋向于单分散的特征。

Tetrahydrofolatecoenzyme,Benzimidazoline,One-carbontransfer,Mannichalkali,Tetrahydroisoquinoline,Tetrahydro-β-carboline

四氢叶酸辅酶，苯并咪唑烷，一碳转移，Mannich碱，四氢异喹啉，四氢-β-咔啉

Biology having or consisting of four similar parts; tetramerous flowers.

拥有四个相同的部分或者由四个相同的部分组成；四数花。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。