在导学群模式下，导学员的角色是多重的，职责是多方面的。
In the mode of Learners' Guidance Group, the role and responsibility of the guiding learning attendant are various.
构建导学群网络教学环境是开展现代远程教育的前提和基础。
Construction of network teaching environment of "Guiding Leaning crowd" is the prerequisite and basis of launching modern distance education.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike,.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike.
认为本文确定的18个监测导联的电极位置可客观反映18导联心电图的ST - T动态变化及QRS波群改变，可以推广。
Positions of 18 monitoring leads electrodes can reflect objective change of ST-T and QRS waves of routine 18-lead electrocardiogram. This method may be used widely.
方法应用心电图机描记常规12导联心电图，按心电图测量标准测量QRS波群电压。
Methods The voltage of QRS wave were measured with 12 leads electrocardiogram by electrocardiograph.
方法应用心电图机描记常规12导联心电图，按心电图测量标准测量QRS波群电压。
Methods The voltage of QRS wave were measured with 12 leads electrocardiogram by electrocardiograph.
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