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  3. Egypt Felled by Famine Even ancient Egypt’s mighty pyramid builders were powerless in the face of the famine that helped bring d

Egypt Felled by Famine Even ancient Egypt’s mighty pyramid builders were powerless in the face of the famine that helped bring d

admin2009-06-15  75
问题  Egypt Felled by Famine
Even ancient Egypt’s mighty pyramid builders were powerless in the face of the famine that helped bring down their civilisation around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometres to the south was ultimately to blame -- and the same or worse could happen today.
The ancient Egyptians depended on the Nile’s annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods.
Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile4.
The Blue Nile mud has a different isotope signature from that of the White Nile. So by analysing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river.
Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river’ would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt’s Old Kingdom.
The weakened waters would have been catastrophic for the Egyptians. "Changes that affect food supply don’t have to be very large to have a ripple effect in societies," says Bill Ryan of the Lamont Doherty Earth Observatory in New York.
Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D.C. "Anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically."
选项 A、Because they once worked miracles.
B、Because they were well-built.
C、Because they were actually very weak.
D、Because even they were unable to rescue their civilisation.
答案D
解析 这道题问的是：作者为什么提及“建筑金字塔的人”?文章开头有这么一句话，中文意思是：即使是古埃及伟大的金字塔建筑者面对那场在公元前2180年促使他们的文明毁灭的饥荒也无能为力。D说的是：甚至是他们也不能挽救他们的文明。因此D是正确答案。A说的是：他们曾创造过奇迹。B说的是：他们很强壮。C说的是：他们其实很弱。
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