It provides tools for statistically measuring and comparing the effectiveness of lessons, relative both to the entire student population and to subgroups based on demographics and other factors.
它提供了统计学上衡量和比较课业的成效，并根据统计数据和其他因素对全体学生进行划分的工具。
Oftentimes the assembly includes a mud motor, directional drilling and measuring equipment, measurements-while-drilling tools, logging-while-drilling tools and other specialized devices.
井底钻具组合经常包括一个泥浆马达、定向钻进及测量设备、随钻测量工具、随钻测井工具和其它特殊的装置。
Our main products are fasteners, metal tools, measuring tools and the other industrial spare parts.
我司主要产品包括紧固件、五金工具、量刃具、工业零配件等。
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