Three dimension random sampling frame was con-ducted with the mean total product quantity per labor(A),agricultural product price index(B) and the rate of rural industrial labors as three experiment factors;the average ruralnet income per capita as the experinient target.
用劳均农产品提供总量（Ａ）、农产品价格指数（Ｂ）和农村工业劳动力比率（Ｃ）作为３个试验因素，农村人均纯收入为试验目标，３个因素均划分为３个水平，形成２７个水平组合，将河南省１４３个县市按组合归类构成抽样框，随机抽取一个样本进行方差分析和Ｆ检验。
Because of the frequent changes in the item units to be sampled for enterprises under the quota limit, the sampling frame is rather unstable, which exerts adverse impact on the precision in assessing the samples.
在限额以下贸易业抽样调查中 ,抽样单位变动频繁 ,抽样框极不稳定 ,对抽样估计的精度带来不利的影响。
This paper presents a fast inventory method of crop planting structure, based on the GVG instrument and transect sampling framework.
以“中国农情遥感速报系统”使用的GVG农情采样系统和样条采样框架为基础 ,提出了快速获取全国农作物种植结构的技术方法 ,并以 2 0 0 2年为例 ,开展全国夏粮和秋粮种植结构的调查与现状分析。
Please check the box
请在小方框内打"√"
Please tick appropriate boxes
请在适当的方框中打勾
Draw a box around your answer.
在你的答案上画个方框
square set and back filling method
方框支架充填采矿法
ground-glass finder
方框式取景[检景]器
square set stope
方框支护回采工作面
Boxed text is original ISO 9001:2000 text.
带方框的内容源于ISO9001 2000.
A pattern of checks or squares.
方格图案格子或方框的图案
To mark with a checked or squared pattern.
以方格标记在…上标上格子或方框图案
The sector-specific supplemental requirements are outside the boxes.
行业特殊补充要求在方框外.
meaning for each sentence below.
从方框中找出与句中意思相同的单词。
I don't think I can break that record.
Ⅶ. 用方框中所给单词的适当形式填空
Listen and then complete the dialogues with the words in the box.
听一听，用方框里的单词来完成对话。
Write the information in the form below.
把你获得的信息填在下面的方框里。
Block Diagram Realization of Trajectory Simulation in MATLAB Environment
MATLAB环境下弹道仿真的方框图实现
{Select a project in the Projects box.}
{请在“项目”方框中选定一个项目。}
{Specify a view by clicking one in the View box.}
{请在“视图”方框中单击，指定视图。}
Splits the active frame adding the new frame below the current
拆分在当前框架下方新添框架的活动框架