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(wù)
在線答疑、課后同類題練習、講義下載、短信提醒5.It was under attack for 900 days, but the people of the city never gave in. 城市遭到攻擊達900天，但是圣彼得堡人民從未屈服。1). under attack 遭到攻擊;attack n. / vt. 攻擊;襲擊;E.g. make an attack on the enemy 攻擊敵人;The PLA soldiers attacked the enemy under over of darkness. 解放軍戰(zhàn)士趁著黑夜襲擊敵人。2). under prep. 在……的過程中; E.g. The matter is under discussion. 這件事情還在討論之中。The road is under repair and is closed to motor traffic. 正在修路，禁止機動車輛通行。3). give in vi.屈服;讓步于;如要表示“向某人屈服”，要用give in to sb.; E.g. The murderer had to give in to the police in the end. 那個兇犯最后不得不向警察屈服。
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