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、短信提醒高考英語閱讀理解試題之說理議論類
Feeling blue about the world? “Cheer up.” says science writer Matt Ridley. “The world has never been a better place to live in， and it will keep on getting better both for humans and for nature.”
Ridley calls himself a rational optimist—rational， because he‘s carefully weighed the evidence; optimistic， because that evidence shows human progress to be both unavoidable and good. And this is what he’s set out to prove from a unique point of view in his most recent book， The Rational Optimist. He views mankind as a grand enterprise that， on the whole， has done little but progress for 100，000 years. He backs his findings with hard facts gathered through years of research.
Here‘s how he explains his views.
1 ) Shopping fuels invention
It is reported that there are more than ten billion different products for sale in London alone. Even allowing for the many people who still live in poverty， our own generat
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