逐步采用

Group 4, reaming and filing instrumentation with reamers and H files; group 5, filing instrumentation with K files only; group 6, the ultrasonic instrumentation.

研究分两部分：第一部分：将60颗离体牙随机分为6组，分别为空白对照组、扩大针组、扩与K型锉组、扩与H型锉组、K型锉组和超声扩锉组，采用逐步后退法预备根管。

Correlation and stepwise multiple regression between main chemical compositions of tobacco leaves and climate factors in different stages during the growing season in different tobacco-growing areas were performed under the same cultivation conditions.

根据纬度差异和地理方位，将我国主产烟区的7省12县分为南北两大烟区，采用统一栽培模式，对两区烤烟（Nicotiana tabacum L，）主要化学成分和大田生长期不同时段的气候因素进行多元相关及逐步回归分析，初步获得了两烟区烤烟化学成分的主导气候影响因子。

Methods Sixty human teeth with single root were instrumented using step-back technique, then were divided into six groups and treated with different concentrations EDTA paste and NaClO solution.

选择60颗离体单根管牙，用逐步后退法预备根管，预备后随机分成6组，采用不同质量分数的EDTA糊剂对根管进行处理，分别为5%、10%、15%、17%和20%EDTA糊剂，另设生理盐水组作为对照。

METHODS: 8 curved artificial root canals were prepared with stainless steel K files by the step-back technique, the root canals were digitally photographed, the images were analysed by the software Image-Pro Plus, the shapes and positions of the root canals were measured and analysed. SPSS10.0 software package was used for statistical analysis, paired-samples t test was used to compare the difference of the means among sample groups.

使用手用不锈钢K锉，按逐步后退法预备8个弯曲人工根管，根管预备过程中对根管及根尖孔进行微距摄影，用图像分析软件Image-Pro Plus对根管的形态与位置变化进行测量、分析；实验数据采用SPSS10.0统计软件包进行统计学分析，选用配对t检验比较组间差异。

Secondly, to analyze seismic response of the concrete gravity dam, subspace iterative method was applied to compute free vibration period of the dam, time integration method was builtup for the seismic time history analysis and formulation of coupled vibration of reservoir water and dam were also deduced.

其次，针对混凝土重力坝的地震响应分析问题，采用子空间迭代法计算了大坝的自振周期，建立了地震时程分析的逐步积分方法，并且推导了库水和坝体耦合振动的理论公式。

Descriptive statistics, T test, analysis of variance, Scheffe's post hoc comparison, multiple regression, stepwise regression analysis and path analysis were used to analyze the data.

采用描述性统计分析、t检定、单因子变异数分析、Scheffe事后多重相关、多元回归、逐步回归与路径分析进行资料分析。

"Learning and Remembering Chinese Characters" provides a systematic study aid designed with the psychological principles to ease and bear on the daunting process of learning Chinese characters. One of the key principles is the use of visual imagery. It has a modern approach: use of simplified characters and pinyin with little emphasis on historical etymology and is learning-oriented, using visual and imaginative memorisation techniques from the psychology of learning with tips on learning habits

易速者，是指本系列编写的目的在于帮助读者容易快速地掌握英语；全能者，是指本系列涉及英语学习的方方面面——动词、名词、形容词、副词、介词、短词、句型、同近义词语辨异，典型错误解析和基础语法。365者，是指本系列采用每天学一点儿的形式，使读者充分利用零碎时间，日积月累而增加自己的英语知识，逐步提高使用英语的能力和水平。

This article aims at the optimization research of enterprise training model for Shengli Oil Field in basis of reference and studying to the training model of foreign advanced enterprises, through the systemic analysis to the actuality and problems existed in its enterprise training, compactly in combination of the actual characters of its staff distribution and relative substantives, by means of integration of theory and practice, combining the character of personnel scatter ,basic unit independent, on the base of studying the foreign advanced enterprise training model, to strengthen the efficient and purpose and to heighten the training effect and quality in order to keeping the oil field sustained and stable develop to cultivate excellent management technical person, in order to realizing"one hundred creative ,one hundred victory"grand prospects to offer the strong mental support and ensure.

本文旨在通过系统分析胜利油田企业培训的现状和存在的问题，并紧密结合胜利油田人员分散、基层单位相对独立等实际特点，采用理论与实践相结合的方法，在借鉴和学习国内外先进企业培训模式的基础上，对胜利油田的企业培训模式进行进一步的优化研究，逐步建立更加符合油田实际的企业培训模式，从而进一步增强企业培训的针对性和有效性，提高培训效果和培训质量，为油田持续、稳定发展培养更多、更优秀的管理、专业技术及高技能人才，为实现&百年创新、百年胜利&的宏伟愿景目标提供强有力的智力支持和保证。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。