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[职称英语阅读理解] 2015职称英语考试理工类A级阅读理解练习题(3)

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  The Exploding Lakes of Cameroon

  blue waterbirdsand fish.For the people in the northwestern Cameroonhowever, the image is

  out of Lake Monoun and came down into the nearby villageskilling thirtyseven people.Two

  killed 1,700 people.

  collected in the craters of old volcanoes The volcanoes under Lake Nyos and Lake Monoun are

  through cracks in the bottom of the lake. This is normal in a crater lake. In most crater lakesthese

  bottom of the lake rises and mixes with the water at the topallowing the gases to escape slowly.

  reason for this factbut as a resultthese lakes have more gases tapped at the bottom than other

  times more gases.When a strong windcool weather a stormor a landslidecauses the

  In the pastno one knew when the gases might explodeso there was no way for the villagers

  way to reduce the gas pressure at the bottom of Lake Nyos.They stood a 672-foot plastic pipe in

  the top of the pipethe team put several holes that could be opened or closed by a computer.Now

  up through the pipe into the air like a fountain.With less pressurea disastrous explosion is much

  To protect people nearby until all of the pipes are in place.the scientists have installed early

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