4. The main purpose of the text is .
A. to advertise for an English company
B. to predict the future trend of science
C. to show how rapidly science develops
D. to introduce some intelligent clothing
【解析】选D。主旨大意题。通读全文可知作者是向我们介绍几种智能的衣服、布料等。
阅读理解。阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
(2017·绍兴统考)When people first walked across the Bering Land Bridge thousands of years ago, dogs were by their sides, according to a study published in the journal Science.
Robert Wayne of the University of California, Los Angeles, and Jennifer Leonard of the Smithsonian Institute, used DNA material—some of it unearthed by miners in Alaska—to conclude that today’s domestic dog originated in Asia and accompanied the first humans to the New World about 10, 000 to 15, 000 years ago. Wayne suggests that man’s best friend may have enabled the tough journey from Asia into North America. “Dogs may have been the reason people made it across the land bridge, ”said Wayne. “They can pull things, carry things, defend you from fierce animals, and they’re useful to eat. ”
Researchers have agreed that today’s dog is the result of the domestication(驯化)of wolves thousands of years ago. Before this recent study, a common thought about the precise origin of North America’s domestic dog was that Natives domesticated local wolves, the descendants(后代)of which now live with people in Alaska, Canada, and the Lower 48.
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