备战2010年6月英语四级考前每日一练(4)

　　57.According to the passage，what is PTK used to?

　　[A]To locate one’S birth place.

　　[B] To promote genetic research.

　　[C] To find out ifone is the father of a child.

　　[D]To help improve one’S intelligence.

　　58.The first two paragraphs of the passage shows PTK’S__________.

　　[A]easy availability

　　[B]flexibility in pricing

　　[C]successful promotion

　　[D]popularity with households

　　59.What is Skeptical observers’opinion on ancestry testing?

　　[A] It fails to trace distant ancestors.

　　[B] It rebuilds reliable bloodlines.

　　[C] It contains fully genetic information.

　　[D] It fails to achieve the claimed accuracy.

　　60.A problem commercial genetic testing faces iS__________.

　　[A]disorganized data collection

　　[B]overlapping database building

　　[C]excessive sample comparison

　　[D]lack of patent evaluation

　　61.What is the author mainly discussing in the passage?

　　[A] Fors and Againsts of DNA testing.

　　[B] DNA testing and its problems.

　　[C] DNA testing outside the lab.

　　[D] Lies behind DNA testing

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