上反角是指飞机翼展方向与水平面的夹角。
本论文在固定床微反装置上，考察扩散效应对异丙苯烷基化反应产物中异构体组成的影响。
This paper studied the alkylation of cumene on fixed bed micro-reactor to discuss the effect of product diffusion.
解释了成就测试的概念； 从理论上研究了成就测试与教学之间的关系及成就测试对教学的反拨效应；
She states the definition of achievement tests and examines the interrelationship between achievement testing and teaching and learning and the backwash effect on English teaching and learning;
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