C. Approving.
D. Uninterested.
66. How does the passage mainly develop?
A. By providing examples.
B. By making comparisons.
C. By following the order of time.
D. By following the order of importance.
67. What is the author’s purpose in writing the passage?
A. To stress the role of dirt.
B. To introduce the history of dirt.
C. To call attention to the danger of dirt.
D. To present the change of views on dirt.
【答案】CA CD
66. 答案C
【解析】【解析】3.(2011·湖南卷)C
A recent study of ancient and modern elephants has
come up with the unexpected conclusion that the African elephant is divided into two distinct (不同的) species
The discovery was made by researchers at York and Harvard universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modern elephants—the Asian elephant, African forest elephant and African savanna elephant
Once they obtained DNA sequences (序列) from two fossils (化石),mammoths and mastodons the team compared them with DNA from modern elephants. They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths.
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