Mechanically actuated combustion air flaps ; safety requirements , testing and marking 机械操作的燃烧空气风门片.安全性要求.试验和标记
Safety of machinery - human physical performance - recommended force limits for machinery operation 机械安全.人体特性.机械操作的推荐使用的力极限值
Improving the biological scores of the high school students ; finally , according to results above the research , the author put forward some feasible suggestions and thoughts : 1 . it is a step by step adptable course when to implement anyway the new theory of teaching ; 2 . implementing of anyway the new educational theory should be supported by students , teachers , parents , and people of the whole society ; 3 . teachers should genuinely reflect teaching in order to regulate it through theory and practice ; 4 . in the course of inqury teaching , students should genuinely reflect self - consciousness ; 5 实施探究教学策略的确提高了学生的学习主动性,增强了学生的主体意识。分析原因,主要有以下四点: )充分、自主的学习活动,增强了学生的主体地位,克服了传统教学中教师事先安排好的,形式单一,时间短暂的,大多是外部机械操作的活动,体现了学生生物学习的主动性和自主性,也体现了学生活动的自主探究过程、交流过程、反思过程和整理过程。