Based on the teaching courts,we lead out a new methord and it has been provided that use the mini-hole board can take up the speed and gain well effects.
文章提出了新的快速调节的办法,实践证明,将小孔遮光板引入实验,大大提高了调节速度并收到良好的教学效果。
Effects of shading at different filling stages on nitrogen accumulation and translocation in wheat at different nitrogen rates;
不同施氮量下子粒灌浆不同阶段遮光对小麦氮素积累和转移的影响
The index of the light shading percentage of cotton fibre is discussed in this paper.
讨论了棉纤维材料遮光率的指标;介绍了一种测试方法;对单根棉纤维全长范围内的遮光率进行了测试,得到了基础性的数据;并对双层纤维及外推到三层纤维的遮光率变化规律进行了测试分析,这些参数对有关仪器的设计将有指导意义。