B. How to Live a Much Healthier Life

　　C. How to Make Your Life Longer Than Others

　　D. Healthy Habits May Give Extra 14 Years

　　【参考答案】53、DAC

　　56. D

　　高考英语冲刺阅读理解。

　　请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。

　　The discovery of an ancient giant panda skull has confirmed its bamboo diet dates back more than 2 million years and may have played a key part in its survival.

　　A Chinese-US research team reports its results today following studies on a fossil skull found in south China’s Cuangxi Zhuang Autonomous Region in 2001.

　　The six fossils unearthed in Jinyin Cave are dated between 2.4 and 2 million years ago, according to the report in Proceedings of the National Academy of Sciences, an influential US journal.

　　Jin Changzhu, of the chinese Academy of Sciences (CAS) and lead author of the paper, said the smaller fossil skull indicates the giant pandas were about a third smaller than today’s pandas.

　　Researchers knew the panda reached its maximum size about 500,000 years ago, when it peaked ,and then gradually became smaller.

　　Jin, a paleontologist (古生物学者) at the Institute of Vertebrate paleontology and Paleoanthropology (古人类学) attached to the CAS, said the size variation was a basic rule of evolution.

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