TED演讲:如何不对世界感到无知(1)
I'm going to ask you three multiple choice questions. 我会给你们做三道多项选择题。 Use this device. Use this device to answer. 用这个装置来回答。 The first question is, how did the number of deaths per year from natural disaster,how did that change during the last century? 第一个问题是 在过去一个世纪里每年因自然灾害死亡的人数发生了怎样的变化。 Did it more than double, di...