查询词典 high-class

Good thermal stability and self-extinguishing behavior was observed with the cured polybenzoxazine resins. Second, furan-containing benzoxazine monomers, P-FBz, BPA-FBz, and 4FP-FBz were prepared using furfurylamine as a raw material. Formation of furfurylamine Mannich bridge networks in the polymerizations of P-FBz and BPA-FBz increased the cross-linking densities and thermal stability of the resulting polybenzoxazines. P-FBz and BPA-FBz- based polymers also exhibited high glass transition temperatures above 300℃, high char yields, and low flammability with a limited oxygen index value of 31. The dielectric (Dk3.21–3.39) and mechanical properties (high storage modulus of 3.0–3.9 GPa and low coefficient of thermal expansion of 37.7– 45.4 ppm) of the P-FBz and BPA-FBz-based polymers were superior or comparable to other polybenzoxazines. 4FP-FBz used for polybenzo- xazine modification by means of formation of benzoxazine hybridation with P-FBz.

第二部份以2-呋喃甲胺为起始物，制备了P-FBz、4FP-FBz与BPA-FBz 三个含呋喃官能基之氧代氮代苯并环己烷的单体；BPA-FBz与P-FBz於开环聚合中形成之Mannich bridge网状结构有效地提升聚氧代氮代苯并环己烷聚合物之交联密度与热安定性；Poly与Poly具有大於300℃之玻璃转移温度、高的焦炭生成率与具有31之极限氧指数(Limited oxygen index， LOI)的难燃性特质，Poly与Poly之介电常数(Dk=3.21~3.39)与机械性质[3.0~3.9 GPa的储存模数与37.7~45.4ppm之低热膨胀系数( Low coefficient of thermal expansion， Low CTE)]均较其他聚氧代氮代苯并环己烷为优；4FP-FBz具有低之介电常数(Dk=2.7)，以其作为降低介电常数之反应型改质剂，与P-FBz混成，证实可有效地降低Poly的介电常数。

Results High dense renal cyst is usually homogeneous hypoechogenicity on sonograms and homogeneous high/iso attenuation on CT images and color doppler is helpful in diagnosing.Atypical angiomyolipoma usually shows homogeneous high attenuation on unenhanced CT images,homogeneous enhancement on enhanced CT and homogeneous isoechogenicity on sonograms.The CT features of Xanthogranulomatous pyelonephritisinclude multiple,rounded,low density areas with enhancing rings arranged in a hydronephrotic pattern known as bear paw sign.Acute focal bacterial nephritisshows wedge lesion and stripe sign on delayed enhanced CT images.

结果 高密度肾囊肿常表现为B超均匀低回声，CT均质或高密度灶，彩色多普勒超声有助诊断；不典型肾血管肌脂瘤常表现为B超均匀回声，CT平扫均质高密度且均匀强化；黄色肉芽肿性肾盂肾炎的特征是CT示群集的类圆形的低密度区以及环形增强带形成&熊掌征&；急性局限性细菌性肾炎的CT延时增强扫描以及动态观察显示楔形病灶以及条纹征，并随治疗逐渐消退。

According to the variation in the components of intermediateacid igneous rocks coming from the lower crust, it is possible to restrain the depth of the source area and the minimum thickness of the crust, and thus to provide important information for the study of the deep process of the continental intraplate mineralizationGlobally, many world level porphyry copper deposits and metallogenic systems formed by hypabyssal hot liquid have their close relationship with the synchronous adakite in spacetime and genesis; domestically, the adakitelike rocks have been identified to be related to the metallogenesis in the main metallogenic areas in ChinaThe recognition of adakitelike rocks having no relationship with the process of subduction makes it possible to construct a metallogenic model of continental intraplate porphyry metal deposits by combining other geological evidences, and this model is totally different from the metallogenic model of porphyry copper deposits with Bsubduction setting constructed by Sillitoe (1972)The existence of adakitelike rocks may be the necessary condition but not the sufficient one for forming the largescale porphyry deposits and the hypabyssal hotliquid deposits, whose metallogenic elements mainly came from the mantleThe metallogenic potential of adakitelike rocks is achieved by the entering of the mantle material, and the metallogenic specialization of adakitelike rocks is decided by the distribution characteristics of the metallogenic elements in the upper mantleAn important reason for the adakitelike magma related to subduction being advantageous to mineralization is that there were abundant high pressure and high temperature liquid coming from the subducted platepieces and the magma of high fO2 coming from the melting of subducted platepiecesHowever, for those adakitelike rocks, whose occurrence has continental plate background but does not relate to the subduction, their metallogenic mechanism is not clear yetBased on the concept of modern mineral exploration and combined with the analysis of integrated geological information, we may better realize the practical prospecting significance of the adakitelike rocks

根据起源于下地壳的中酸性岩浆岩的成分变化，可以约束其源区深度以及地壳最小厚度，为大陆板内成矿作用的深部过程研究提供重要信息。全球范围内，许多世界级斑岩铜矿和浅成热液矿化系统与同期的埃达克质岩存在密切的时空与成因联系，在国内主要成矿区带也识别出与金属成矿作用有关的埃达克岩。与俯冲过程无关的埃达克质岩的识别，使我们有可能结合其他地质证据构建完全不同于Sillitoe(1972)B型俯冲环境的斑岩铜矿成矿模式的大陆板内斑岩型金属矿床成矿模式。对于规模巨大、矿质主要源自地幔的热液矿床的形成，埃达克岩可能是必要条件，但不是充分条件。埃达克岩的成矿潜力通过地幔物质加入而获取，埃达克岩的成矿专属性由上地幔成矿元素分布特征决定。与俯冲有关的埃达克质岩浆之所以有利于成矿，重要的原因是存在大量来自俯冲板片的高压、高温流体以及俯冲板片熔融形成高氧逸度(fO2)的熔体，但产出在大陆板内背景、与俯冲无关的埃达克岩的成矿机制还不清楚。根据现代资源勘查理念，结合综合地质信息分析，埃达克质岩具有实际找矿意义。

The text follows the curricular idea "accelerating the student"s development",basing on developmental rule in body and mind of students in high school, from thepsychology, especially from writing mentality of students, thinking the problems ofcurrent composition teaching reform in high school. Aim at the existent problem incurrent writing teaching by understanding its own rules of composition teachingcombining with internal mind in student"s writing, bringing reforming thoughts ofwriting teaching in high school.

本文遵循&促进学生发展&的课程理念，根据中学生身心发展的规律，从心理学的角度，尤其从是中学生写作心理的角度，探讨中学生在作文过程中的内部心理机制，思考当前中学作文教学面临的问题，进而提出中学作文教学改革的构想。

Methods Twelve rabbits fed with high-cholesterol diet for 8 weeks wererandomly divided into two groups:(1) high cholesterol group (n=6):maintained on high cholesterol diet for 6 weeks;(2) niacin group (n=6):the same cholesterol diet plus niacin 200mg·kg~(-1·d~(-1) for 6 weeks. Controlgroup (n=6) was fed with normal diet for 14 weeks. Subcutaneousadipose was collected from inguen for RNA analysis. Leptin and MCP-1levels in serum and adipocytes culture supernatant were measured byELISA.

选取12只健康雄性新西兰兔给予高胆固醇饲料培养8周，建立高胆固醇兔模型后，随机分为：(1)高胆固醇组：继续饲以高胆固醇饲料6周；(2)烟酸治疗组：在饲以高胆固醇饲料的基础上给予烟酸缓释剂0.2g.kg~(-1)。d~(-1)，共6周；另选普通饮食14周雄性新西兰兔(n=6)作为对照组。

Our main brand agent has: a full range of Capacitive Products Korea, Japan and aluminum electrolytic capacitors OS-CON/POSCAP, EMERAL TECH Power Module DC-DC (with vicor, Interpoint compatible) high-performance, high efficiency, high reliability, such as a full range of Products.

我们主要代理的品牌有：韩国全系列电容产品，日本铝电解电容及OS-CON/POSCAP， EMERAL TECH电源模块DC-DC（与vicor、Interpoint兼容）高性能、高效率、高可靠性等全系列产品。

We seek to explore whether high order service activities are becoming spatially more concentrated or dispersed. On the basis of reviewing literatures about the location of high order services, particularly, in the context of advances in face-to-face contact in high order services would appear to remain relatively important and continue to exert an important impact upon intrametropolitan location.

在大量文献回顾的基础上，我们发现，在通讯技术高度发达的环境下，高层次服务业中的集聚和面对面的交流仍很重要，并对都市区内高层次服务业的布局有重要影响。

Especially notable is that, with the Xi'an High-tech Zone 2 of the expansion of green space in Shanghai, China Group, Ziwei real estate high-tech zones and jointly promote the rapid development of the second phase, while high-tech zones as the largest commercial logistics support center — Lagerstroemia MALL building has been fully opened.

尤其值得注意的是，在西安高新区2扩大绿地在上海，中国集团，紫薇地产高新区，共同促进快速发展的第二阶段，而高新区作为最大的商业物流支援中心—紫薇广场建设已全面开放。

The medicine composition is used in treating laryngopharyngitis, and has high safety, low cost, high effective component content and high stability.

本发明药物组合物克服了现有药物在药效方面的不足，从而提供一种安全性好、成本低、有效成分含量更高、稳定性更好的一种治疗咽喉炎的药物组合物。

The volcanic rocks consist of trachytic basalt, basaltic latite, latite and trachyte. The characteristics of this volcanic sequence are: low TiO2 and silica saturation, high alkalis, high K2O/Na2O value and Fe2O3/FeO value, high and variable Al2O3, enrichment in Rb, Sr, Ba, Zr, U, Th and LREE.

岩石硅近饱和，全碱含量（尤其是K2O）高，K2O／Na2O、Fe2O3／FeO比值大，Al2O3含量高且变化大，TiO2含量低，富集Rb、Sr、Ba、Zr、Th、U和LREE等元素，稀土配分为轻稀土富集型，锶、铅、氧等同位素显示了岩浆的幔源特征。

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。