互動封閉仿真課堂
1、智能交互 2、電子板書式視頻教學 3、在線互動問答 4、封閉課堂啟發(fā)式教學方式
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，課后可方便復習及導出錯題本升級服務
在線答疑、課后同類題練習、講義下載、短信提醒改寫為正常語序為，Man did not know what heat is until the early years of the 19th. 現(xiàn)在將not提前，后面就不能再用否定了,否則意思就變了。
3) 以否定詞開頭作部分倒裝
如 Not only…but also, Hardly/Scarcely…when, No sooner… than等，要倒裝。例如：
Not only did he refuse the gift, he also severely criticized the sender. 他沒有收下禮物，還狠狠批評了送禮的人。
Hardly had she gone out when a student came to visit her. 她剛出門，就有個學生來訪。
No sooner had she gone out than a student came to visit her. 她剛出門，就有個學生來訪。
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