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[全屏观看] 点击右键- 另存为 可保存这个Flash影片...
[全屏观看] 点击右键- 另存为 可保存这个Flash影片...
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Climate Puzzles 气候之迷 Scientists who predict Earth's future climate wish they knew how climate has changed in the past few thousand years. Learn more about modeling global climate -- today on Earth and Sky. JB: This is Earth and Sky. Most scienti...
By Greg Flakus Mexico CIty 26 July 2007 The July 5 and July 10 bomb attacks on natural gas pipelines in central Mexico led to the temporary shutdown of factories in several industrial cities and raised fears about the country becoming a target for te...