爆破距离

CNN 2010-01-15

RANDI KAYE, CNN CORRESPONDENT: We take our shoes off, remove our laptops, and toss our bottled water all in the name of safety. But are we any safer today than we were before 9/11? Not exactly, says Bruce Schneier, author and security technologist. B

发表于:2019-01-08 / 阅读(125) / 评论(0)

CNN2010年(一)月

SSS 2008-09-01

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?. [Spray sound.] Killing bugs? No. [Spray sound.] Deodorizing the bathroom? No. [Spray sound.] Checking for explosives, yes. Because chemists at the University of Califor

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Scientific American(九)月

the furthest distance in the world

The furthest distance in the world Is not between life and death But when I stand in front of you Yet you don't know that I love you 世界上最遥远的距离不是生与死而是我就站在你面前你却不知道我爱你 The furthest dista

发表于:2019-01-08 / 阅读(61) / 评论(0)

英语小短文

北师大版高中英语模块7--Unit 20 New Frontiers 2

[00:01.56]Gunpowder [00:03.47]Gunpowder was invented by the Chinese [00:05.73]in the eighth century AD. [00:08.28]Early Chinese scientists discovered [00:10.64]that they could make an explosive substance [00:12.76]by mixing sulphur,charcoal and saltp

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词汇典故:独立日

Independence Day 词汇典故:独立日 Hello and welcome to the VOA Learning English program Words and Their Stories. Independence Day is a huge celebration in the United States. People celebrate by having parades and picnics and usually end the day

发表于:2019-01-12 / 阅读(42) / 评论(0)

2015年VOA慢速英语(七)月

萨拉热窝市中心爆炸，无一人伤亡

萨拉热窝市中心爆炸，无一人伤亡 SARAJEVO, Feb. 10 (Xinhua) -- A huge explosion was heard in central Sarajevo Monday night, and police said there were no injuries. A local police press officer told Xinhua the explosion occurred at the en

发表于:2019-02-05 / 阅读(53) / 评论(0)

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