英语PPT——doomday关于世界末日的PPT_英语课展示时的.pptVIP

The 9.0 magnitude(震级) quake struck Friday off Japan‘s eastern coast, and prompted（及时的） tsunami （su’nɑmi）（海啸）warnings across the Pacific（太平洋） as far away as South America and the U.S. West Coast. The Red Cross warned that the 10-meter high tidal wave（海啸） could wash over some small islands entirely.　 　 Some 3,000 people have now been confirmed dead since last week’s earthquake and subsequent tsunami （su’nɑmi） but officials believe the death toll（死亡人数） could rise into the tens of thousands, with a further 2,000 bodies washing up on the shores of north-east Japan yesterday. Do you remember the scene in the film 2012? Yellowstone National Park’s caldera super-volcano erupt and causes earthquakes and seaquakes. The doomsday comes. Maybe it will come true in the future. Scientists are predicting that the worlds largest super-volcano in one of Americas most popular national parks could erupt in the near future.Yellowstone National Park’s caldera has erupted three times in the last 2.1million years and researchers monitoring it say we could be in for another eruption. They said that the super-volcano underneath the Wyoming park has been rising at a record rate since 2004 - its floor has gone up three inches per year for the last three years alone, the fastest rate since records began in 1923. It would explode with a force a thousand times more powerful than the Mount St Helens eruption in 1980. Spewing lava (喷出岩浆)far into the sky, a cloud of plant-killing ash（灰烬）would fan out（散开 ）and dump a layer 10ft deep up to 1,000 miles away. July 22, 1980: Mount St Helens in Washington erupts. A Yellowstone caldera eruption would explode with a force a thousand times more powerful ? Two-thirds of the U.S. could become uninhabitable (不适于居住的)as toxic(有毒的 )air sweeps through it, grounding thousands of flights and forcing millions to leave their homes. But hampered妨碍by a lack of data they have stopped short of an all-out warning and they are unable to put a date on when the next