This research found: the tutor in the first operation cycle should be emplasized the roles of "supporter" and "facilitator ". In the second operation cycle ,the role of "guider" was emplasized . In the third operation cycle , the role of "reflecter" was emplasized .However the " supporter " and the "demonstrator" at the three operation cycles were need to funtion.

研究中發(fā)現(xiàn)：促進者在第一行動循環(huán)首重「支持者」和「協(xié)助者」角色三级A片想干就干；在第二行動循環(huán)中黄色网站久久aaa，著重在「引導者」角色；在第三行動循環(huán)中文字幕永久更新资源站，著重在「反思者」角色嗯啊视频在线免费观看；而「示范者」以及「支持者」角色，在三個行動循環(huán)中皆須發(fā)揮功能国产亚洲综合久久系列。

Reflecter：反光燈/罩

Rear shade 后罩 | Reflecter 反光燈/罩 | Rivet 鉚釘

sloping reflecter：傾斜反射面

sloping platform 斜平臺 | sloping reflecter 傾斜反射面 | sloping step 斜階梯