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Methods:The MSCT datas of 65 mechanical intestinal obstructions confirmed by operation and pathology were collected and reconstructed with multiplanar reconstruction technique,including 43 cases underwent plain scan;the remaining 22 cases underwent plain and contrast-enhanced scan.Results: Contrast to operation and pathology,there were 25 adhesions,24 neoplasms,5 bowel torsions,5 bezoarhs,4 intussusceptions,2 Crohn's diseases in 65 mechanical intestinal obstructions,the diagnostic accuracy of MPR in mechanical intestinal obstruction was 100%,and the accuracy of the pathogeny was 84.6%.

以往在肠梗阻的诊断中应用最多的为腹部X线平片，但因其信息量不足，对大部分病人不能提出肯定诊断，且对梗阻的病因及病变肠管的血供都无法判断。16层螺旋CT在肠梗阻的诊断中具有明显优势，快速、薄层扫描可得到高质量的各向同性后处理重建图像，在显示肠壁、肠腔和周围结构等方面具有较大优势，有利于肠梗阻的梗阻部位及病因、并发症的诊断。

X/ s correct aspect ratio, although 4:3 telecines have existed.

通常会使用正确的高宽比，但有时也有4：3的TC。

X. n5 ^! B; I% h8 J L3 y Well, two games, two stinkers by the Yanks' starting pitchers.

b' s/ s7 1 '呃，两场比赛，两场由洋基先发投手搞砸的比赛。

He's mixing in some splitters and changeups.

而他有时会X配一些指叉球与变速球。

In this paper, the structure and its morphology of the as-spun isotactic polypro- pylene monofilaments has been investigated by using cross polarized microscope, SALS, SEM, WAXD, density, birefringence and Hardy's thin cross-section device.

本文采用正交偏振光、小角激光散射、扫描电子显微镜，广角X光衍射、密度、双折射和切片技术，对工业用丝——IPP单丝的未拉伸丝的结构及其形态进行了广泛的研究。

Nearly 40 years after Americans first set foot on the moon on July 20, 1969, with NASA's historic Apollo 11 flight, a host of private rocketeers are hoping to follow to win a multimillion-dollar prize.

如果说有一个名字在很多&Google登月X奖&竞争者的口中流传，那一定是&宇宙机器人&技术公司。

R% \, J 5、The disappearance of such materials as pornographic and obscene books, periodicals and tapes is proof that China's campaign against porns is making progress.

黄色书刊及音响制品现己难觅踪迹，这证明了中国的扫黄运动正在取得进展。， X/ O1 W9 C8 | L

DSC thermal analyzer, X-ray diffractometry, Infrared thermal photography technique, Mossbauer spectra, High resolution electron microscope, Positron annihilation techniques, Infrared absorption spectra, Internal friction analyzer with an inverted torsion pendulum, magnetic balance and melt spinning technique were employed in the tests.

本文采用钡蒸气平衡法，用柔性石墨密封的钼反应室，使用自制的TiN和BaS坩锅，在双温带钼算炉内，测定了纯铁液中Ba-O、Ba-S和Ba-P反应的平衡常数和活度相互作用系数，测定了Ni，Cr，Ti，Si，Al对钡的活度相互作用系数以及钡在纯铁液中的溶解度。

objective to evaluate clinical effect of the handling protaper nickel-titanium rotary instruments in preparation of canals of posterior teeth.methods 96teeth with pulpitis or periapical periodontitis were instrumented by handling protaper rotary instruments using step-down technique,and by k files using step-back technique for control.all teeth were obturated with lateral condensation methods.the efficiency of preparation was analyzed with ra-diographs before and after operation.results no transportation,apical blockage and ledge were found in test.the technique could keep canals smooth.there were two ledge,one instrument fracture and nine transportation in control.the operative time was shorter and post treatment pain seldom occurred in handling protaper group.conclusion the handling protaper niti rotary instruments can prepare the canals effectively and safety.after the preparation,the canals could be easily washed,sterilized and filled.it is an efficient instrumentation method for posterior teeth's canals and be used widely.

目的 评价手用protaper预备后牙根管的临床效果。方法选取患有牙髓炎和根尖周炎的后牙96例，随机分成试验组和对照组各48例，试验组用手用protaper多锥度镍钛旋转器械逐步伸入法预备根管，对照组用k锉，逐步后退法预备根管，两组均用侧向加压充填法充填根管，根据治疗前后的x线片，评价后牙根管预备效果。结果试验组无根管偏移、根尖阻塞、台阶，且根管壁平滑流畅，无器械折断等并发症发生。对照组有2例台阶形成，器械折断1例，根管偏移9例。试验组操作时间短且术后疼痛轻微。结论应用手用protaper预备后牙根管快速、安全，成形效果好，易于根管冲洗消毒及填充，可视为临床上预备后牙根管的有效方法。

Silver-coated glass microsphere core-shell particle s were prepared by silver electroless plating on the self-assembly monolayer technique.

采用自组装化学镀银技术制备了银包玻璃微珠核-壳粒子，并且运用X射线衍射仪、扫描电镜和电子能谱仪等对该核-壳粒子的物相和形貌等进行了表征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。