D．Patti Page was not only a successful singer but also a successful actress

　　答案：D　推理判断题。根据文章所列举的帕蒂·佩奇很多引起轰动的歌曲可推断，她是一名成功的歌手；根据最后一段可推断她同时也是一名成功的女演员，故选D项。

　　B

　　(2015·吉林长春调研)

　　Eating 40 percent less food could extend a person's life by 20 years, according to scientists.

　　Researchers at the Institute of Healthy Aging at University College London are developing a treatment that they hope will fight the “disease” of getting older.

　　They are looking into genetics (遗传学) and find that lifestyle can affect aging and add years, possibly decades, to a person's life.

　　Age­related diseases such as cardiovascular disease, cancer and neuro degeneration can also be treated, it is claimed.

　　They want to find out how the life of a rat can be increased by up to 30 percent simply by reducing its food intake.

　　Researcher Dr. Piper told The Independent: “If you reduce the diet of a rat by 40 percent it will live for 20 or 30 percent longer. So we would be talking 20 years of human life. This has shown on all sorts of animals, even Labradors (a kind of dog).” The scientists are also studying fruit flies, which share 60 percent of human genes and age in a similar manner, and mice.

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