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  3. It is common knowledge that healthy foods such as fruits and vegetables contain certain nutrients that promote good health—namel

It is common knowledge that healthy foods such as fruits and vegetables contain certain nutrients that promote good health—namel

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问题     It is common knowledge that healthy foods such as fruits and vegetables contain certain nutrients that promote good health—namely vitamins and minerals that are essential to the body. However, once these compounds enter the body and become digested, do they still possess the same healthful【C1】______? Do they still perform the desired action to create a【C2】______result?
    That is what researchers at Newcastle University recently set out to【C3】______. Scientists analyzed the polyphenols, a type of antioxidant, in green tea to see how they【C4】______the body once digested.【C5】______the polyphenols in tea are known for health benefits, Dr. Ed Okello and his team wanted to better understand how these polyphenols act once【C6】______the body. Their study, which was recently published in the journal, showed that the chemicals【C7】______the breakdown of polyphenols were more effective at promoting health than the polyphenols【C8】______. "There are certain chemicals we know to be【C9】______and we can identify foods which are rich in them but what happens during the digestion process is【C10】______to whether these foods are actually doing us any good," said Dr. Okello.
    The research showed that【C11】______the polyphenols were digested in the gut, the resulting compounds had a greater ability to bind to toxic substances.
    "Green tea has been used in Traditional Chinese Medicine for centuries and what we have here provides the scientific【C12】______why it may be effective【C13】______some of the key diseases we face today."
    Tea is one of the many common and natural dietary【C14】______in Asian cultures shown by modern science to have【C15】______unique health benefits. Mushrooms are another common food that has been【C16】______for centuries. They are used【C17】______in many cooking, (notably Chinese, Korean, European, Japanese and Indian). They are also used in Traditional Chinese Medicine for their ability to promote immune health. Certain species of mushrooms have great【C18】______abilities to regulate the immune system and promote【C19】______within the body. These mushroom species【C20】______benefits even after digestion and absorption into the blood stream.
【C18】
选项 A、rare
B、typical
C、natural
D、inartificial
答案C
解析 本题所填入的形容词应表达调节免疫系统(regulate the immune system)功能体现的是蘑菇的何种能力。蘑菇是不需经过加工的天然食品．C项natural“天然的”可用来表示蘑菇所起的作用，符合其固有特性。
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