分层的

The cross-sectional approach used a stratified sample, based on an initial list of electric power connections, resulting in the selection of 707 individuals over 18 years of age.

横截方法根据电力连接一张最初的名单使用了分层取样，造成707个个体的选择在18岁期间。

Objective To study the interrelation of life habit,knowledge and consciousness in preventing infectious disease,and to provide evidence for health education of infectious diseases.Methods A stratified cluster sample of1007college students were questionnaired.

目的 了解学生日常生活习惯、传染病防治知识、防治意识的状况及其相互关系，开展大学生传染病防治健康教育提供依据方法采用分层整群抽样的方法，对广州市1007名大学生进行问卷调查。

Methods Study subjects were selected through stratified sampling and data were collected through questionnaire and physical examination.

方法］采用分层整群抽样的方法获取研究样本，采用问卷调查和体检相结合的方法收集相关信息。

Perfusion CT can stratify the leel of risk of subsequent infarction for normal-appearing regions on noncontrast CT.

CT灌注成像能对NCCT上表现正常的脑组织发展为脑梗死的危险性进行评估分层。

By the discussion of fact in power plant, the article fixes on the main scheme of AVC sub-station system for power plant side.

基于三级分层控制结构的思想着重研究了其二级电压控制部分的电厂侧AVC子站系统。

Moreover, I extend the sampling problems from one population to two or more subpopulation.

并且由单一母体的简单随机抽样，扩展到分层抽样的问题。

Methods 3944 persons were selected by systematic sampling in 3 districts.

采取分层随机整群抽样的方法，于2006年10月和2007年9月进行2次调查，以示范路上沧浪区、金阊区、高新区的33个单位、10个社区居民，共计3 944人作为调查对象。2007年9月，以非示范路上某区采取同样方法抽取居民809人进行问卷调查。

So the optic rectum is centrum of visual system. The avian optic tectum showsthe highly organized lamination.

视顶盖是视叶外侧部一个分层很明显的结构，在顶盖下的视叶内侧区包括顶盖前区、峡核和中脑网状结构。

The dissertation takes economic growth of Hainan province as an example, and applies positive analysis to test the hypothesis of multi-layer economic growth.

本文以海南省经济增长为例，用实证分析的方法验证经济分层次更多增长的理论假设。

Objective To provide a new anesthetic method for the cervical plexus anesthetic.Methods The structures of deep layer of anterior jugular around the anesthetic point were (15 cm below the superior margin of thyroid cartilage and the lateral 4 cm to the anteriomedian line) observed on 30 sides of adult cadavers.The distance between the importat nerves.

用30例成人标本，分层解剖观察新麻醉点（甲状软骨上缘下15 cm 与前正中线外4 cm 交点处）与颈前部深层周围结构的毗邻关系，测量了主要神经血管距麻醉点的距离。

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。