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    50．A．whole B．most C．half D．other 【查看更多】

     

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    阅读理解

    　　Sweet potatoes are fat-free, high in fiber and full of the vitamins that research suggests reduce your risk of life-shortening diseases. To stay healthy, we must eat more fruits and vegetables, and sweet potatoes are a great source of beta carotene (胡罗卜素) and other carotenoids. According to a study of the diets of almost 90,000 nurses, eating about one cup a day of fruits and vegetables rich in carotenoids (which the body turns into vitamin A) can cut your risk of stroke in half and reduce your risk of heart disease by 22 percent. Other research suggests beta carotene protects against breast, lung and stomach cancers.

    Beta carotene is the most famous member of the carotenoids family. In fact, a medium-sized sweet potato contains nearly 12 mg of beta carotene (anti-aging experts usually suggest 6 to 11 mg per day ). Sweet potatoes are also a low-fat source of vitamin E. Research has linked high E diets with a lower risk of heart disease. This vitamin pill in an orange jacket also packs a vitamin C punch-it has more C than apricots (a kind of fruit ). Researh suggests that vitamin C protects against ailments ranging from cataracts (an eye disease) to cancer. In addition, a UCLA (University of California Los Angeles ) study linked high vitamin C diets with a longer life. Recent studies have showed that antioxidant vitamins C, E and beta carotene fight a fierce battle against free radicals (自由基), which cause cell (细胞) damage and lead to various

    illnesses. Therefore, to keep fit, eat more sweet potatoes.

    1．According to the text, there exists a lof of ______in sweet potatoes.

    [　　]

    A．fiber, beta carotene, other carotenoids, vitamin E and C

    B．beta carotene, other carotenoids, fiber, vitamin A and E

    C．vitamin A, beta carotene, fiber, vitamin E and C

    D．beta carotene, other carotenoids, vitamin A and E

    2．This text as a whole suggests that eating sweet potatoes can help ______.

    [　　]

    A．cut your risk of stroke and heart disease

    B．protect against breast, lung and stomach cancers

    C．protest against ailments ranging from cataracts to cancer

    D．you stay healthy and reduce your risk of life-shortening diseases

    3．“This vitamin pill in an orange jacket”in the passage refers to ______.

    [　　]

    A．sweet potato
    B．vitamin C pill
    C．vitamin E pill
    D．beta carotene

    4．The best title of this passage might be ______.

    [　　]

    A．The Vitamin Superstar
    B．On Sweet Potatoes
    C．Beta Carotene and Vitamins
    D．Diet and Disease

    查看答案和解析>>

    阅读理解

    　　Sweet potatoes are fat-free, high in fiber and full of the vitamins that research suggests reduce your risk of life-shortening diseases. To stay healthy, we must eat more fruits and vegetables, and sweet potatoes are a great source of beta carotene (胡萝卜素)and other carotenoids (类萝卜素). According to a study of the diets of almost 90, 000 nurses, eating about one cup a day of fruits and vegetables rich in carotenoids (which the body turns into vitamin A)can cut your risk of stroke in half and reduce your risk of heart disease by 22 percent. Other research suggests beta carotene protects against breast, lung and stomach cancers.

    　　Beta carotene is the most famous member of the carotenoids family. In fact, a medium-sized sweet potato contains nearly 12mg of beta carotene( anti-aging experts usually suggest 6 or 11 mg per day). Sweet potatoes are also a low-fat source of vitamin E . Research has linked high E diets with a lower risk of heart disease. This vitamin pill in an orange jacket also packs a vitamin C punch—it has more C than apricots ( a kind of fruit). Research suggests that vitamin C protects against ailments ranging from cataracts (an eye disease)to cancer. In addition, a UCLA (University of California, Los Angeles)study linked high vitamin C, E and beta carotene fight a fierce battle against free radicals (自由基), which cause cell damage and lead to various illnesses. Therefore, to keep fit, eat more sweet potatoes.

    1．According to the text, there exists a lot of ________ in sweet potatoes.

    [　　]

    A．fiber, beta carotene, other carotenoids, vitamin E and C

    B．beta carotene, other carotenoids, fiber, vitamin A and E

    C．vitamin A, beta carotene, fiber, vitamin E and C

    D．beta carotene, other carotennoids, vitamin A and E

    2．This text as a whole suggests that eating sweet potatoes can help ________.

    [　　]

    A．cut your risk of stroke and heart disease

    B．protect against breast, lung and stomach cancer

    C．protect against ailments ranging from cataracts to cancer

    D．you stay healthy and reduce your risk of life-shortening diseases

    3．“This vitamin pill in an orange jacket” in the passage refers to ________.

    [　　]

    A．sweet potato

    B．vitamin C pill

    C．vitamin E pill

    D．beta carotene

    4．The best title of this passage might be ________.

    [　　]

    A．The Vitamin Superstar

    B．On Sweet Potatoes

    C．Beta Carotene and Vitamins

    D．Diet and Disease

    查看答案和解析>>

    阅读理解

    　　Zinc(锌)is one of about 20 elements necessary for good health．It is present in the body in a very small amount, but it makes it possible for important chemical actions to be carried out in cells．Scientists are just beginning to discover how zinc and other element work．

    　　Researchers first studied zinc as a way to speed recovery．Dr．Waltor Powys, formerly with the United States Air Force, noted that the laboratory animals recovered faster when some substances were added to their food．One of these substances was zinc．Dr．Powys later tested the zinc treatment on an American airman recovering from medical operations．The airman who received zinc sulphate(硫酸盐)recovered in one half the usual time．Other doctors studied persons who had a number of strange disorders．The doctors learned that all of these problems were caused by a lack of zinc in the body．They treated these disorders successfully by giving the patients zinc sulphate．

    　　The amount of zinc in the body can be found by examining the blood and hair．A lack of this important element is not uncommon among people in both industrial and developing countries．Zinc is found in most high protein foods, such as meat, milk, fish and eggs．It is also found in whole grains．But many people do not eat enough of these foods．Food makers should add the elements so that more people could get needed amounts of these essential substances．

    (1)

    Which of the following statements in NOT true?

    [　　]

    A．

    Scientists are just starting to study how zinc and other elements work．

    B．

    People only need a very small amount of zinc to maintain good health．

    C．

    Zinc is important because it allows important chemical actions to take place in cells．

    D．

    A lack of zinc is rare among people in developed countries．

    (2)

    Some health experts say food makers should add some elements ________ people won't lack these essential substance．

    [　　]

    A．

    therefore

    B．

    since

    C．

    for the purpose that

    D．

    for the effect that

    (3)

    The topic of this passage is ________．

    [　　]

    A．

    the role of zinc sulphate

    B．

    the relationship between zinc and people's health

    C．

    the amount of zinc that the body needs

    D．

    the food that contains zinc

    查看答案和解析>>

    阅读理解

    　　Zinc(锌)is one of about 20 elements necessary for good health．It is present in the body in a very small amount, but it makes it possible for important chemical actions to be carried out in cells．Scientists are just beginning to discover how zinc and other element work．

    　　Researchers first studied zinc as a way to speed recovery．Dr．Waltor Powys, formerly with the United States Air Force, noted that the laboratory animals recovered faster when some substances were added to their food．One of these substances was zinc．Dr．Powys later tested the zinc treatment on an American airman recovering from medical operations．The airman who received zinc sulphate(硫酸盐)recovered in one half the usual time．Other doctors studied persons who had a number of strange disorders．The doctors learned that all of these problems were caused by a lack of zinc in the body．They treated these disorders successfully by giving the patients zinc sulphate．

    　　The amount of zinc in the body can be found by examining the blood and hair．A lack of this important element is not uncommon among people in both industrial and developing countries．Zinc is found in most high protein foods, such as meat, milk, fish and eggs．It is also found in whole grains．But many people do not eat enough of these foods．Food makers should add the elements so that more people could get needed amounts of these essential substances．

    (1)

    Which of the following statements in NOT true?

    [　　]

    A．

    Scientists are just starting to study how zinc and other elements work．

    B．

    People only need a very small amount of zinc to maintain good health．

    C．

    Zinc is important because it allows important chemical actions to take place in cells．

    D．

    A lack of zinc is rare among people in developed countries．

    (2)

    Some health experts say food makers should add some elements ________ people won't lack these essential substance．

    [　　]

    A．

    therefore

    B．

    since

    C．

    for the purpose that

    D．

    for the effect that

    (3)

    The topic of this passage is ________．

    [　　]

    A．

    the role of zinc sulphate

    B．

    the relationship between zinc and people's health

    C．

    the amount of zinc that the body needs

    D．

    the food that contains zinc

    查看答案和解析>>

    阅读理解

    　　Sweet potatoes are fat-free, high in fiber and full of the vitamins that research suggests reduce your risk of life-shortening diseases．To stay healthy, we must eat more fruits and vegetables, and sweet potatoes are a great source of beta carotene(胡萝卜素)and other carotenoids(which the body turns into vitamin A)．According to a study of the diets of almost 90,000 nurses, eating about one cup a day of fruits and vegetables rich in carotenoids can cut your risk of stroke in half and reduce your risk of heart disease by 22 percent．Other research suggests beta carotene protects against breast, lung and stomach cancers．

    　　Beta carotene is the most famous member of the carotenoids family．In fact, a medium-sized sweet potato contains nearly 12mg of beta carotene(anti-aging experts usually suggest 6 to 11 mg per day)．Sweet potatoes are also a low-fat source of vitamin E．Research has linked high E diets with a lower risk of heart disease．This vitamin pill in an orange jacket also packs a vitamin C which is more than apricots(a kind of fruit)．Research suggests that vitamin C protects against ailments(小疾)ranging from cataracts(an eye disease)to cancer．In addition, a UCLA(University of California Los Angeles)study linked high vitamin C diets with a longer life．Recent studies have showed that antioxidant Vitamins C, E and beta carotene fight a fierce battle against free radicals(自由基), which cause cell(细胞)damage and lead to various illness．Therefore, to keep fit, eat more sweet potatoes．

    (1)

    According to the text, there exists a lot of ________ in sweet potatoes．

    [　　]

    A．

    fiber, beta carotene, other carotenoids, Vitamin E and C

    B．

    beta carotene, other carotenoids, fiber, Vitamin A and E

    C．

    Vitamin A, beta carotene, fiber, Vitamin E and C

    D．

    beta carotene, other carotenoids, Vitamin A and E

    (2)

    This text as a whole suggests that eating sweet potatoes can help ________．

    [　　]

    A．

    cut your risk of stroke and heart disease

    B．

    protect against breast, lung and stomach cancers

    C．

    protect against ailments ranging from cataracts to cancers

    D．

    you stay healthy and reduce your risk of life-shortening diseases

    (3)

    “This vitamin pill in an orange jacket”in the passage refers to ________．

    [　　]

    A．

    sweet potato

    B．

    vitamin C pill

    C．

    vitamin E pill

    D．

    beta carotene

    (4)

    According to the passage, which of the following statements is not true?

    [　　]

    A．

    A sweet potato contains 12mg of beta carotene．

    B．

    Experts usually suggest 6 to 11 mg of beta carotene per day．

    C．

    High vitamin C diets will lead to a longer life．

    D．

    Beta carotene protects against breast, lung and stomach cancers．

    (5)

    The best title of this passage might be ________．

    [　　]

    A．

    The vitamin superstar

    B．

    Sweet potatoes

    C．

    Beta carotene and vitamins

    D．

    Diet and disease

    查看答案和解析>>


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