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Points out that the propagational derection and vibration surface of ordinary and extraordinary ray in crystal can be determined by the characters of wave surface in crystal and Huygens,Construction.

本文研究单色自然光入射到单轴晶体后产生双折射现象，所得的O光和e光在晶体内的传播方向和振动面，可利用晶体中波面的特点和惠更斯作图法来确定，使读者对这一问题有更进一步的认识和理解。

On the insertion of Li with low current density, the crystal structure is keeping original spinel; while with higher current desity or by thermal activation, owing to violent movement of Li~+ ions, part of crystal structure transforms into rock type similar to face—centered cubic structure of ferrous oxide.

结果表明，以较小电流密度嵌锂时，晶体结构保持原来的尖晶石型；当以较大电流密度嵌锂或热激活时，由于Li~+的运动加剧，部分晶体结构转变为类似于氧化亚铁的面心立方结构。

The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

Hoton growing companies to develop 4 major series of products: liquid crystal computer integration (All-in-one PC); liquid crystal display; Bluetooth family of products and solutions; customer a professional OEM / ODM special purpose computer system.

不断发展的Hoton公司发展出4大系列产品：液晶一体化电脑(All-in-one PC)；液晶显示器；蓝牙系列产品及解决方案；为专业客户OEM/ODM 特殊用途的计算机系统。

The relationship between the crystal structure and their point of zero charge, the floatability of some silicate minerals with and without metal ions as activator, using sodium oleate as collector, the adsorption behavior of the metal ions on the silicate minerals, are investigated by analysis the crystal structure of the silicate minerals.

通过分析硅酸盐矿物晶体结构，研究硅酸盐矿物零电点与晶体结构的关系，硅酸盐矿物在油酸钠体系中的浮游特性，硅酸盐矿物对金属离子的吸附规律，金属离子活化的矿物可浮性规

Under the effect of air pressure produced by air pump, Electronic Foamer makes the diluted carpet cleanser produceplentiful and high-density foam, which will make the dirt react with the cleanser. When the dirt comes into crystal and suspends on the carpet surface, one wet/dry vacuum cleaner is needed to suck the crystal away until perfectcleaning performance.

利用气泵产生气压的原理使按比例稀释的干泡地毯清洁剂在气压的作用下产生丰富的、高密度的泡沫，使地毯深层的污渍经干泡地毯清洁剂产生化学反应后，污渍微粒会结晶并悬浮于地毯表面上，用吸水或吸尘机吸去即可，从而达到理想的清洁效果。

Our brothers and sisters, along with the help of Shana Liskia in Freeport, have grown a crystal from traces of the disease and that crystal can find the disease.

我们的兄弟姐妹，还有自由港的Shana Liskia的帮助，已经成生了一个水晶，可以跟踪疾病，那个水晶也能找到这种疾病的。

Content structure of materials; crystal imperfection; structure of metallic surface, semiconductive oxide surface, structure of the molecular crystal surface, the rearrangement mechanism of the surface atoms and methods of surface analysis; fundamental theories about chemical processes and phenomena of plasma

课程内容：材料的结构；晶体缺陷；金属表面、半导体氧化物表面和分子晶体表面的结构和表面原子重排的机理，表面分析方法；等离子体的化学过程基础理论和化学现象及其特征；硅酸盐材料的通性和几种典型硅酸盐材料的结构，硅酸盐热力学和固相反应，硅酸盐固相烧结的过程和基本原理；典型高分子材料简介。

Since CGH is not real-time available,many scholars are studying the real-time applications of CGH with modern display devices, such as liquid crystal display, The applications include, real-time pattern recognition using liquid crystal display based joint transform correlator, CGH interferometric technology for anti-counterfeiting, and real-time application of Furrier transform CGH.

但由于存在不能实时实现的弱点，许多学者用现代显示器件进行了计算全息实时应用研究，如：光学联合变换滤波器图像识别技术，实时计算全息干涉防伪技术，傅里叶变换实时全息图应用。

Therefore, in a clean crystal, it can put it in brine soak 24 hours, then washed with water, wipe with a clean cotton cloth can be; crystal can also be placed in sea water can soak 40 minutes; If the smaller will be allowed on the Amethyst Geode inside, can achieve the purification, degaussing and other functions.

因此，在清洁水晶，它可以把它在盐水浸泡24小时，然后用清水洗净，用干净的布擦拭即可；晶体也可以在海水中可浸泡40分钟；如果小将在紫晶洞内允许的，可达到净化，消磁等功能。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。