互動封閉仿真課堂
1、智能交互 2、電子板書式視頻教學(xué) 3、在線互動問答 4、封閉課堂啟發(fā)式教學(xué)方式
隨堂測試、知識梳理、易錯點揭示、總結(jié)啟迪智能錯題本
聽課中的錯題能自動加入錯題本,課后可方便復(fù)習(xí)及導(dǎo)出錯題本升級服務(wù)
在線答疑、課后同類題練習(xí)、講義下載、短信提醒Samhain signifies "summers end" or November. Samhain was a harvest festival with huge sacred bonfires, marking the end of the Celtic year and beginning of a new one. Many of the practices involved in this celebration were fed on superstition.
The Celts believed the souls of the dead roamed the streets and villages at night. Since not all spirits were thought to be friendly, gifts and treats were left out to pacify the evil and ensure next years crops would be plentiful. This custom evolved into trick-or-treating.