【題目】You are probably familiar with the saying：An apple a day keeps the doctor away.A recent research carried out by the Chinese University of Hong Kong may change the saying:

An apple a day may keep aging away.

The research chose fruit flies(果蠅), as they share many genes(基因)with humans.The fruit flies were either fed normally or had an apple extract(濃縮物) added to their diet.

It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed.The research group also found it easier for the flies to walk，climb and move about as they aged.

According to the result, the researchers believed that the antioxidants(抗氧化劑) in the apple extract helped clean up dangerous chemicals(化學(xué)物質(zhì)) that cause illnesses，as well as aging.

In another study，researchers examined diets of thousands of women.They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.

The apples’ genetic code(遺傳密碼) was discovered recently.It allows scientists to develop nicer and healthier fruits.Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.

Apples that kill the desire(欲望) to eat could also be produced, with the first “extra-healthy’’ apples on supermarket shelves within just four or five years.

The team that keeps studying apple DNA includes 100 scientists from five countries.Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today’s apple tree, experienced a great genetic change.The number of many of its genes doubled.The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits.

【1】Why were fruit flies used for the research?

A.Because they have a similar diet to humans.

B.Because they have a history as long as apples.

C.Because they share a lot of genes with humans.

D.Because they feed on nothing but apple extract.

【2】What result did the researchers find out?

A.Apples produce chemicals that can change human genes.

B.Apples have antioxidants that kill chemicals that cause aging.

C.Apples are rich in vitamins that are needed in humans’ bodies.

D.Apples produce chemicals that make apples taste more delicious.

【3】What can we infer(推斷)from the passage?

A.Eating apples may bring us more advantages than we might believe before.

B.People who have the habit of eating apples don’t need to see a doctor.

C.Apples that kill the desire to eat are already available in supermarkets now.

D.People will eat apples instead of peaches and strawberries from now on.

【答案】

【1】C

【2】B

【3】A

【解析】

試題分析：一天一個蘋果，疾病遠(yuǎn)離我。本文講述的是科學(xué)研究表明，經(jīng)常吃蘋果，有助于抗老化。

【1】C 細(xì)節(jié)理解題。題意：為什么該實驗選擇了果蠅？A.Because they have a similar diet to humans.因為他們有與人類相似的食譜；B.Because they have a history as long as apples.因為他們有著與蘋果一樣悠久的歷史。C.Because they share a lot of genes with humans.因為他們和人類有相同的基因；D.Because they feed on nothing but apple extract.因為只給它們喂了蘋果。The research chose fruit flies(果蠅), as they share many genes(基因)with humans.可以看出選擇果蠅是因為他們與人類有相同的基因。故選C。

【2】B 細(xì)節(jié)理解題。題意：研究者發(fā)現(xiàn)了什么？A.Apples produce chemicals that can change human genes.蘋果產(chǎn)生的化學(xué)物質(zhì)，可以改變?nèi)祟惖幕颍?/span>B.Apples have antioxidants that kill chemicals that cause aging.蘋果擁有的抗氧化劑可以殺死產(chǎn)生衰老的化學(xué)物質(zhì)；C.Apples are rich in vitamins that are needed in humans’ bodies.蘋果富含有人體必需的維生素；D.Apples produce chemicals that make apples taste more delicious.蘋果產(chǎn)生的化學(xué)物質(zhì)使得其更可口。根據(jù)“According to the result, the researchers believed that the antioxidants(抗氧化劑) in the apple extract helped clean up dangerous chemicals(化學(xué)物質(zhì)) that cause illnesses，as well as aging.”可知：蘋果擁有的抗氧化劑可以殺死產(chǎn)生衰老的化學(xué)物質(zhì)；故選B。

【3】A 推理判斷題。題意：從短文我們可以推斷出什么？A.Eating apples may bring us more advantages than we might believe before.吃蘋果會給我們帶來比我們以相信的更多的好處；B.People who have the habit of eating apples don’t need to see a doctor.有吃蘋果習(xí)慣的人不需要看醫(yī)生；C.Apples that kill the desire to eat are already available in supermarkets now.殺死吃的欲望的蘋果現(xiàn)在也出現(xiàn)在超市了；D.People will eat apples instead of peaches and strawberries from now on.從此人們會吃蘋果，而不是桃子或草莓。短文從科學(xué)的角度給我們講述了吃蘋果可以抗衰老，是我們不知道的。故選A。

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