Little George Bush was elected President of the United States for the second time in year 2004. A. /, a B. a, the C. /, the D. the, the 题目和参考答案——青夏教育精英家教网—

     The great Snipe is a little shore bird-not one that would be considered a great athlete. However, a
recent study has shown that these slightly fat birds not only fly nonstop for long periods of time during
their annual migration, but do so at record speeds.
     The brown migratory birds (候鸟) that are about the size of a pigeon (鸽子) spend their summers in
Eastern Europe and winters in Central Africa, a distance of about 2,800 to 4,000 miles. In May 2009, a
team of researchers led by Dr. Raymond Klaasen from Sweden's Lund University fitted ten Great Snipes with tiny geo-locating devices (装置) that allow scientists to figure out when and where the birds travel,
and let them loose. The following year they found three of the birds and took back the devices. What
they discovered was quite stunning.
     All three birds had flown nonstop to Central Africa in August of 2009-one had flown 4,225 miles in
just 3.5 days. The second one had covered a distance of 3,833 miles in three days, while the third had
managed to fly 2,870 miles in a mere 48 hours or two days. Even more surprising was that these birds
had traveled at speeds that averaged about 50 miles per hour-making it the fastest known migration ever.
     While many birds migrate longer distances, they do so over a period of a few months, resting and
feeding in between. However, despite the fact the Great Snipe has plenty of opportunities, it does not
stop. And they do the entire flight with their own power, with no assistance from the wind. The tiny bird
is able to make this unbelievable direct flight because of all the fat it gradually gathers in its body, which it
then uses as fuel.
     Native no North Eastern Europe, Great Snipes live in marshlands and wet meadows (沼泽地和湿草地). But they are also on the list of endangered animals because of loss of habitat.

试题分类