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AbstractObjectives1 Correlate bone mineral densityto vertebral compressive strengths.2 Consummate the technique for percutaneous polymethylmethacrylate vertebroplasty and observe the pattern of PMMA imaging distribution.3 Determine the strength and stiffness of osteoporotic with or without vertebroplasty with PMMA bone cement.4 Correlation of BMD,insertion torque and pull-out strengths of pedicle screws.5 Ascertain whether augmentation with PMMA bone cement can enhance pedicle screw fixation in the osteoporotic spine.6 Ascertain whether augmentation pedicle screw fixation with PMMA bone cement can enhance the stability of unstable thoracolurner burst fractures of osteoporotic spine.

目 的1、测试椎体压缩强度，分析强度与骨矿物质密度（bone mineral density，BMD）的相关关系。2、观察经皮椎体成形术后聚甲基丙烯酸甲脂（polymethylme- thacrylate，PMMA）骨水泥在椎体内的形态学分布及影像学表现。3、比较PMMA骨水泥骨质疏松椎体成形术前/后椎体最大抗压力和压缩刚度的变化。4、分析椎体BMD、螺钉最大旅入力矩和最大拔出力三者之间的关系。5、分析PMMA骨水泥强化骨质疏松椎弓根螺钉后的螺钉的最大轴向拔出力和拔出刚度的变化。6、评价PMMA骨水泥强化骨质疏松椎弓根螺钉脊柱内固定对不稳定型胸腰椎损伤的即刻稳定性和反复载荷后的稳定性。

Then, the outraged hawk, folded up both its wings, drove like an arrow from the sky swooped down on the quail. But when the quail knew "That hawk has come close", it slipped under the clod and unable to react, the hawk shuttered its head right on the spot.

於是，盛怒的大鹰，收起两翼，从空中像箭一样地俯冲下来，扑向鹌鹑，鹌鹑算准了时间，躲到了大土块下面，大鹰来不及反应，结果，就一头撞死在大土块上。

All rats were administered by free drinking, the normal control group were treated by drinking water in 3 months, 45 d group was performed drinking water in 1.5 months and then revival liquid of quantum in 1.5 months, and the 90 d group was administrated the revival liquid of quantum in 3 months.

方法］ 取雌性Wistar大鼠36只，按体重随机分为对照组、量子复活液45 d组和90 d组；以自由饮用方式给药，给予对照组大鼠普通自来水喂养90 d，给予量子复活液45 d组大鼠普通自来水45 d后，再给予量子复活液喂养45 d，给予量子复活液90 d组大鼠量子复活液90 d。

METHODS Thirty six Wistar female rats used in experiment were randomly divided into three groups: the normal control group, 45 d group and 90 d group with the revival liquid of quantum. All rats were administered by free drinking, the normal control group were treated by drinking water in 3 months, 45 d group was performed drinking water in 1.5 months and then revival liquid of quantum in 1.5 months, and the 90 d group was administrated the revival liquid of quantum in 3 months.

方法］ 取雌性Wistar大鼠36只，按体重随机分为对照组、量子复活液45 d组和90 d组；以自由饮用方式给药，给予对照组大鼠普通自来水喂养90 d，给予量子复活液45 d组大鼠普通自来水45 d后，再给予量子复活液喂养45 d，给予量子复活液90 d组大鼠量子复活液90 d。

Corporate holdings account for the proportion of larger stock pot for the East to withdraw from the market, Datang Power Generation, Bank of Communications, Industrial Bank, since the instrument shares, and the reduction of the proportion of larger stocks in the Pacific for long Group century, too-long Chinese medicine, Tai shares, too, and so on of the shares.

公司持有的大汤锅的东方比例退出市场，大唐发电，交通银行，兴业银行，银行因为该文书的股票，以及股票的比例较大减少太平洋集团世纪的长期，太长，中医，大的股票，也等的股份。

Ternary" specializes were many points: One, braised big skirt fin, Taiye chicken, fried Health water lines, Xiehuang chicken wings for the three-ball "four specializes; specializes there Taiye chicken, stewed large Skirts fin, monolithic Serratula birds, flowers ice-shrimp, rich pomegranate chicken, Longfeng Yuanyang ball-Suzhaxieqian; point is a lard-British package, oyster sauce Chashao Bao, Kagemi egg tarts, mosaic egg Ji , Cellular Lai Kok taro, transparent chicken cakes, frozen Danjuan snow, the salt water shrimp Kok, Chashao Bao Yu Ye, Biaohua butter cake, and so on.

大三元&名菜名点繁多：其中，红烧大裙翅、太爷鸡、生炒水鱼丝、蟹黄鸡翼球为大三元&四大名菜；名菜还有太爷鸡、红烧大裙翅、铁板麻花雀、冰梅百花虾、富贵石榴鸡、龙凤鸳鸯球、香酥炸蟹钳等；名点则是架英猪油包、蚝油叉烧包、影美鸡蛋挞、马赛克蛋戟、蜂巢荔芋角、透明鸡蛋糕、雪花冻蛋卷、安虾咸水角、玉液叉烧包、奶油裱花蛋糕等。

Along with big three arrivalses, I also will continuously favour, on the other hand, Be college of study department minister, again just right meet with an undergraduate course valuation, in spite of to who is all kind of pressure, besides is the teaching of the Ministry of Education valuation, that still is not my head up, school begins two month estimate favour dead, attended Normal University television station in Fukien on the other hand, participate television station of work, do film, return have what than the consume more of, again remove have a class of time, I estimate I possibility also have no when, luckily big three since need not learn English also need not learn athletics, easy is easy not a few, but face profession of thorough mental state more or less also have some touch, particularly is more and more of person all seem to have oneself of direction, but I seem to seem big two just just started grope for similar, we the class believe to will haven't a few violent girl and boy devotion to test to grind battalion, everyone also more and more went by different roads, believe big three big four ～ss~～ the person be more and more fickleness, ha ha.

随著大三的到来，我也将陆续忙起来，一方面，作为学院的学习部部长，又刚好碰上本科评估，不论对谁都是一种压力，何况是教育部的教学评估，那还不就是我的头上，开学两个月估计得忙死，另一方面，参加了福建师范大学电视台，要参与电视台的工作，做片子，还有什麼比这个更耗时的呢，再除去上课的时间，我估计我可能也没有什麼时间了，幸好大三既不用学英语也不用学体育，轻松是轻松了不少，但面对专业的深入心理多多少少也是有一点触动的，尤其是越来越多的人都似乎有了自己的方向，而我似乎好像大二才刚刚开始摸索一样，我们班相信会有不少强悍的女生和男生投入考研大军，大家也就越来越分道扬镳了，相信大三大四～~～人是越来越浮躁的，呵呵。

Information is stored in mass storage systems in large units called files. A typical file may consist of a complete text document, a photograph, a program, or a collection of data about the employees in a company. The physical properties of mass storage devices dictate that these files be stored and retrieved in multiple byte units. For example, each sector on a magnetic disk must be manipulated as one continuous string of bits. A block of data conforming to the physical characteristics of a storage device is called a physical record. Thus , a file stored in mass storage will typically consist of many physical records.

在大容积存储系统中，信息是以称为文件的大的单位存储的，一个典型的文件可以是一个全文本的资料，一张照片或一组关于公司员工的数值，大容积存储系统的物理特性表明，这些个文件是按照许多字节为单位存储的检索的，例如，磁盘上每个扇区必需作为一个持续的二进制位串进行操作，符合存储系统物理特性的数值块称为物理记录，因此储存安放在大容积存储系统中的文件通常包罗许多物理记录。

According to the characteristics of large span structure design, such as big diffrence of collumn force, large span and spacious roof, week linkness of different parts and large displacement of bearing, spacil structure methods such as different types of concrete pile with different length, suitable joint and bearing are adopted to achieve the economical and safe demand

提要］针对西北农林科技大学体育馆类大跨度空旷建筑结构的设计特点，如柱底内力差别很大、上部结构空旷、各部分之间的连接较弱、屋盖结构跨度大、支座位移大等，采取差异化的桩型和桩长，适当分缝，合理配置支座等有效的结构措施，达到既安全可靠、又经济性好的目的。

To the gradations with the same maximum nominal grain size,grey correlation was used to analyze the results. The conclusion showed that,except the 9.5 mm-maimum-nominal-grain-size gradation,Jf was influenced mostly by the subtotal triage of coarse aggregates in the third large sieve pore.

对于颗粒最大标称粒径相同的级配，使用灰色关联分析，得出结论：除颗粒最大标称粒径为9.5 mm级配外，Jf受级配中第3大筛孔分计筛余百分率影响最大。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。