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维生素(vitamin)
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考题
Which of these information from labels claims benefits of food nutrition? ()
A、low in cholesterolB、multi-nutritionC、smoking killsD、high in Vitamin C
考题
The ______ we have seen so far suggests that lack of vitamin C may indeed be the cause of his illness.
A. shadowB. activityC. subjectD. evidence
考题
Like with anything new, you should your_________ physician before taking Colon Health Cleansing or any other vitamin.A． discussB． consultC． requestD． tell
考题
Which kind of food is recommended to prevent heart disease, cancer, diabetes, high blood pressure, stroke, and weak bones?[A] Calcium-rich food.[B] Plant-based and starchy staples food.[C] High-fat, high-calorie food[D] Vitamin D-rich food.
考题
there is no reason that they should limit how much vitamin you take ____ they can limit how much water you drink.
A. any more thanB. no more thanC. much more thanD. no less than
考题
The doctor told me I had to expect such things at my age and simply _____ some vitamin pills.()
A. dissolvedB. stuffedC. recommendedD. prescribed
考题
Vitamin C helps to combat stress either from worry or from intense _____ exercise.()
A. handicappedB. physicalC. limitedD. maximum
考题
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Which foods should be eaten to keep us healthy?Let us look at some important vitamins for these answers.Vitamin A helps prevent skin and other tissues from becoming dry.People who do not get enough vitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It also is in the yellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.Vitamin B-one changes starchy（含淀粉的）foods into energy. It also helps the heart and nervous system work smoothly.Without it,we would be weak and would not grow.Vitamin B-one is found not just in whole grains like brown rice,but also in other foods.These include beans and peas,nuts,and meat and fish.Vitamin B-twelve is needed so folic acid（叶酸）can do its work. Together, they help produce red blood cells.Vitamin B-twelve is found naturally in foods such as eggs,meat,fish and milk products.Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy.Vitamin B-twelve is found in green leafy vegetables and other foods,like legumes and citrus fruits.In some countries,it is added to products like bread.Vitamin C is needed for strong bones and teeth,and for healthy blood passages.It also helps wounds heal quickly.The body stores little vitamin C.So we must get it every day in foods such as citrus（柑橘类）fruits,tomatoes and uncooked cabbage.Vitamin D increases levels of the element calcium in the blood.Calcium is needed for nerve and muscle cells to work normally.It also is needed to build strong bones.Ultraviolet light from the sun changes a substance in the skin into vitamin D.Fish liver oil also contains vitamin D.Vitamin K is needed for healthy blood.It thickens the blood around a cut to stop bleeding. Vitamin K can be found in pork products,liver and in vegetables like cabbage,kale and spinach. In most countries,vitamin B-twelve is added to products like bread.A:Right B:Wrong C:Not mentioned
考题
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Which foods should be eaten to keep us healthy?Let us look at some important vitamins for these answers.Vitamin A helps prevent skin and other tissues from becoming dry.People who do not get enough vitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It also is in the yellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.Vitamin B-one changes starchy（含淀粉的）foods into energy. It also helps the heart and nervous system work smoothly.Without it,we would be weak and would not grow.Vitamin B-one is found not just in whole grains like brown rice,but also in other foods.These include beans and peas,nuts,and meat and fish.Vitamin B-twelve is needed so folic acid（叶酸）can do its work. Together, they help produce red blood cells.Vitamin B-twelve is found naturally in foods such as eggs,meat,fish and milk products.Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy.Vitamin B-twelve is found in green leafy vegetables and other foods,like legumes and citrus fruits.In some countries,it is added to products like bread.Vitamin C is needed for strong bones and teeth,and for healthy blood passages.It also helps wounds heal quickly.The body stores little vitamin C.So we must get it every day in foods such as citrus（柑橘类）fruits,tomatoes and uncooked cabbage.Vitamin D increases levels of the element calcium in the blood.Calcium is needed for nerve and muscle cells to work normally.It also is needed to build strong bones.Ultraviolet light from the sun changes a substance in the skin into vitamin D.Fish liver oil also contains vitamin D.Vitamin K is needed for healthy blood.It thickens the blood around a cut to stop bleeding. Vitamin K can be found in pork products,liver and in vegetables like cabbage,kale and spinach. The more Vitamins we have,the more healthy we will be.A:Right B:Wrong C:Not mentioned
考题
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Daisy Williams admits genes play some role in the way she looks,but believes diet is an important factor."It doesn't matter how good the genes are if you don't eat properly and take care of your-self,"she says."If you want to look good,get plenty of rest,exercise every day,eat mostly raw fruits and vegetables and quit worrying."Nowhere do the signs of aging manifest themselves more clearly than in the condition of the skin. When your weight fluctuates（波动）,the skin stretches with each up cycle , but it may not completely shrink back to its original size in the down cycle. As a result,the skin may sag（松弛下垂）.Zinc and vitamin A are important for normal,healthy skin.Zinc helps the skin repair itself, and vitamin A aids in keeping skin supple,preventing dryness and helping shed dead cells.Good sources of zinc are beef,eggs and seafood,while many dark-green leafy vegetables are rich in beta carotene（胡萝卜素）, which the body converts to vitamin A.Vitamin C helps improve the blood supply to the skin and aids in forming collagen（胶原）. Good sources of vitamin C include citrus fruits and juices,cauliflower,snow peas,red and green peppers,broccoli,white and sweet potatoes, tomatoes,watermelon,and honeydew melon.How food is prepared matters too.The longer vegetables cook,the greater the loss of vitamins. Don't soak vegetables when washing them,since water-soluble vitamins such as C will be lost.Good general nutrition is essential to maintaining a healthy,youthful appearance.And the key to good general nutrition is balance.Proteins should make up roughly 10 percent of your daily calorie intake;no more than 30 percent should come from fats;and the remaining calories should come mostly from complex carbohydrates（碳水化合物）.Dark-green leafy vegetables are good sources of beta carotene.A:Right B:Wrong C:Not mentioned
考题
共用题干
Daisy Williams admits genes play some role in the way she looks,but believes diet is an important factor."It doesn't matter how good the genes are if you don't eat properly and take care of your-self,"she says."If you want to look good,get plenty of rest,exercise every day,eat mostly raw fruits and vegetables and quit worrying."Nowhere do the signs of aging manifest themselves more clearly than in the condition of the skin. When your weight fluctuates（波动）,the skin stretches with each up cycle , but it may not completely shrink back to its original size in the down cycle. As a result,the skin may sag（松弛下垂）.Zinc and vitamin A are important for normal,healthy skin.Zinc helps the skin repair itself, and vitamin A aids in keeping skin supple,preventing dryness and helping shed dead cells.Good sources of zinc are beef,eggs and seafood,while many dark-green leafy vegetables are rich in beta carotene（胡萝卜素）, which the body converts to vitamin A.Vitamin C helps improve the blood supply to the skin and aids in forming collagen（胶原）. Good sources of vitamin C include citrus fruits and juices,cauliflower,snow peas,red and green peppers,broccoli,white and sweet potatoes, tomatoes,watermelon,and honeydew melon.How food is prepared matters too.The longer vegetables cook,the greater the loss of vitamins. Don't soak vegetables when washing them,since water-soluble vitamins such as C will be lost.Good general nutrition is essential to maintaining a healthy,youthful appearance.And the key to good general nutrition is balance.Proteins should make up roughly 10 percent of your daily calorie intake;no more than 30 percent should come from fats;and the remaining calories should come mostly from complex carbohydrates（碳水化合物）.Both genes and diets affects people's look.A:Right B:Wrong C:Not mentioned
考题
共用题干
Daisy Williams admits genes play some role in the way she looks,but believes diet is an important factor."It doesn't matter how good the genes are if you don't eat properly and take care of your-self,"she says."If you want to look good,get plenty of rest,exercise every day,eat mostly raw fruits and vegetables and quit worrying."Nowhere do the signs of aging manifest themselves more clearly than in the condition of the skin. When your weight fluctuates（波动）,the skin stretches with each up cycle , but it may not completely shrink back to its original size in the down cycle. As a result,the skin may sag（松弛下垂）.Zinc and vitamin A are important for normal,healthy skin.Zinc helps the skin repair itself, and vitamin A aids in keeping skin supple,preventing dryness and helping shed dead cells.Good sources of zinc are beef,eggs and seafood,while many dark-green leafy vegetables are rich in beta carotene（胡萝卜素）, which the body converts to vitamin A.Vitamin C helps improve the blood supply to the skin and aids in forming collagen（胶原）. Good sources of vitamin C include citrus fruits and juices,cauliflower,snow peas,red and green peppers,broccoli,white and sweet potatoes, tomatoes,watermelon,and honeydew melon.How food is prepared matters too.The longer vegetables cook,the greater the loss of vitamins. Don't soak vegetables when washing them,since water-soluble vitamins such as C will be lost.Good general nutrition is essential to maintaining a healthy,youthful appearance.And the key to good general nutrition is balance.Proteins should make up roughly 10 percent of your daily calorie intake;no more than 30 percent should come from fats;and the remaining calories should come mostly from complex carbohydrates（碳水化合物）.The longer vegetables cook,the greater vitamin C remains.A:Right B:Wrong C:Not mentioned
考题
共用题干
Which foods should be eaten to keep us healthy?Let us look at some important vitamins for these answers.Vitamin A helps prevent skin and other tissues from becoming dry.People who do not get enough vitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It also is in the yellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.Vitamin B-one changes starchy（含淀粉的）foods into energy. It also helps the heart and nervous system work smoothly.Without it,we would be weak and would not grow.Vitamin B-one is found not just in whole grains like brown rice,but also in other foods.These include beans and peas,nuts,and meat and fish.Vitamin B-twelve is needed so folic acid（叶酸）can do its work. Together, they help produce red blood cells.Vitamin B-twelve is found naturally in foods such as eggs,meat,fish and milk products.Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy.Vitamin B-twelve is found in green leafy vegetables and other foods,like legumes and citrus fruits.In some countries,it is added to products like bread.Vitamin C is needed for strong bones and teeth,and for healthy blood passages.It also helps wounds heal quickly.The body stores little vitamin C.So we must get it every day in foods such as citrus（柑橘类）fruits,tomatoes and uncooked cabbage.Vitamin D increases levels of the element calcium in the blood.Calcium is needed for nerve and muscle cells to work normally.It also is needed to build strong bones.Ultraviolet light from the sun changes a substance in the skin into vitamin D.Fish liver oil also contains vitamin D.Vitamin K is needed for healthy blood.It thickens the blood around a cut to stop bleeding. Vitamin K can be found in pork products,liver and in vegetables like cabbage,kale and spinach. Fish liver oil contains vitamin A and vitamin D.A:Right B:Wrong C:Not mentioned
考题
Vitamins are similar because they are made of the same elements—usually carbon,hydrogen,oxygen,and sometimes nitrogen.They are different in that their elements are arranged differently,and each vitamin been（ ）one or more specific functions in the body.A.holds
B.plays
C.performs
考题
Getting enough vitamins is essential to life,although the body has no nutritional use for（ ）vitamins.Many people,nevertheless,believe in being on the“safe side”and thus take extra vitamins.However,a well‐balanced diet will usually meet all the body's vitamin needs.A.exceptional
B.exceeding
C.excess
D.external
考题
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Food and CancerMedical experts have suspected for many years that there is a strong link between what a person eats and cancer. They say a new study provides the first evidence that vitamins could reduce a person's chance of developing cancer. A team of Chinese and American scientists did the study.They are from American National Cancer Institute and the Cancer Institute of the Chinese Academy of Medical Sciences in Beijing. The Journal of the National Cancer Institute published the results of the study. About thirty thousand people between the ages of 40 to 69 took part in the study.They were from the northern central Chinese area of Linxian.Most of them took vitamins and minerals everyday for five years.Linxian was chosen because the people there have an extremely high rate of cancer of stomach and esophagus.Researchers believe that fungus and molds in local foods may be partly responsible for the high cancer rate.Researchers divided those people into eight groups.Seven of the groups received different mixtures of vitamins and minerals daily.The amounts of the vitamins and minerals were 1 to 2 times greater than what American health officials say is needed.The eighth group received sugar pills that had no effect.Those who seemed to gain the most received a mixture of a form of vitamin A called β-carotene,vitamin E and the mineral selenium（硒）.The vitamin and mineral are believed to prevent damage to cells caused by cancer-causing substances.Researchers reported a 1 3 percent drop in cancer rates in those who took β-carotene,vitamin E and selenium.They also found a 10 percent drop in the number of deaths caused by strokes from bursting blood vessels.Scientists warn that it is too soon to know if the effect would be the same among people in other countries.They note that the people in Linxian eat foods that lack necessary vitamins and minerals.Chinese officials will continue to record the health records of the people in Linxian for many years.For now officials reportedly are considering using the results of the study.They want to find a way to improve the health of people in Linxian and other small towns in China. The rate of cancer of stomach and esophagus in Linxian is the highest in China.A:RightB:WrongC:Not mentioned
考题
共用题干
Food and CancerMedical experts have suspected for many years that there is a strong link between what a person eats and cancer. They say a new study provides the first evidence that vitamins could reduce a person's chance of developing cancer. A team of Chinese and American scientists did the study.They are from American National Cancer Institute and the Cancer Institute of the Chinese Academy of Medical Sciences in Beijing. The Journal of the National Cancer Institute published the results of the study. About thirty thousand people between the ages of 40 to 69 took part in the study.They were from the northern central Chinese area of Linxian.Most of them took vitamins and minerals everyday for five years.Linxian was chosen because the people there have an extremely high rate of cancer of stomach and esophagus.Researchers believe that fungus and molds in local foods may be partly responsible for the high cancer rate.Researchers divided those people into eight groups.Seven of the groups received different mixtures of vitamins and minerals daily.The amounts of the vitamins and minerals were 1 to 2 times greater than what American health officials say is needed.The eighth group received sugar pills that had no effect.Those who seemed to gain the most received a mixture of a form of vitamin A called β-carotene,vitamin E and the mineral selenium（硒）.The vitamin and mineral are believed to prevent damage to cells caused by cancer-causing substances.Researchers reported a 1 3 percent drop in cancer rates in those who took β-carotene,vitamin E and selenium.They also found a 10 percent drop in the number of deaths caused by strokes from bursting blood vessels.Scientists warn that it is too soon to know if the effect would be the same among people in other countries.They note that the people in Linxian eat foods that lack necessary vitamins and minerals.Chinese officials will continue to record the health records of the people in Linxian for many years.For now officials reportedly are considering using the results of the study.They want to find a way to improve the health of people in Linxian and other small towns in China.All those people who took part in the study received vitamins and minerals.A:RightB:WrongC:Not mentioned
考题
There is no reason they should limit how much vitamin you take，( )they can limit how much water you drink. A.much more than
B.no more than
C.no less than
D.any more than
考题
维生素主要有（）等多种A、维生素A、维生素B1、维生素B2、维生素C、维生素DB、维生素H、维生素A1、维生素A2、维生素D1、维生素FC、C、维生素维生素F1、维生素A2、维生素D1、维生素FD、D、维生素E、维生素维生素G、维生素H、维生素F
考题
下列有关维生素A的叙述哪些是正确的（）A、环外的4个双键必须与环内双键共轭B、增加环内双键的数目，活性增加C、双键被饱和，活性下降D、增加环内双键的数目，活性下降E、遇lewis酸可发生脱水反应，生成脱水vitamin A活性下降
考题
单选题Donna thinks that ______ can help Mary think more clearly.A
eating a lot of sugarB
studying six hours every dayC
drinking a lot of coffeeD
eating foods high in Vitamin B
考题
多选题下列有关维生素A的叙述哪些是正确的（）A环外的4个双键必须与环内双键共轭B增加环内双键的数目，活性增加C双键被饱和，活性下降D增加环内双键的数目，活性下降E遇lewis酸可发生脱水反应，生成脱水vitamin A活性下降
考题
问答题Passage 1 IF VITAMIN C is good for you, does more mean better? Millions of people think so but scientists have been divided on the issue. Despite a huge research effort, there is little evidence that megadoses of vitamin C, up to 100 times the recommended daily amounts, have beneficial effects. Now an American scientist has come up with an explanation of the lack of effect—and a simple remedy. Millions of Americans take supplements of the vitamin in the belief that its anti-oxidant properties help prevent heart disease, cancer and the ageing process. Most of it, however, goes straight down the pan: the body cannot deal with excess vitamin C, which is rapidly excreted. Even large doses are eliminated in 12 hours and slow-release ones in 16. The way to keep blood levels of the vitamin continuously high, according to Roc Ordman, Professor of Biochemistry at Beloit College, Wisconsin, is to take it twice a day—one 500 milligram does every 12 hours. “If vitamin C really does work as an antioxidant, then taking a supplement once a day might be like wearing a condom half the time.” Professor Ordman said. “Nobody has ever thought to look at how much you have to take to keep the level elevated.” In a study published in the current issue of the gerontology journal Age, Professor Ordman gave varying doses of vitamin C at different times to students and measured the amount excreted in their urine. He found a 500 mg dose was needed every 12 hours “to enrich the blood just enough to ensure there is a little bit leaking out all the time.” This compares with the US-recommended adult daily allowance of 60 mgs. Recommended levels of vitamin C, and other vitamins, have been raised following recognition of their role in mopping up “free radicals” in the blood linked with a range of diseases. However, the British figure of 40 mgs daily for vitamin C is still below the U.S. figure and likely to be raised again. Research on megadoses of vitamin C of 10 and 20 times this level have shown it to have some protective effect against the common cold taken at the first sign. But there is no evidence of a beneficial effect against other diseases of doses vastly higher than the recommended daily amounts. LINUS PAULING, the Nobel Laureate, whose book on vitamin C and the common cold in 1970 popularised the idea of taking fistfuls of supplements, is said to have swallowed 10,000 mgs a day. It is because it is water-soluble and quickly excreted that vitamin C is safe in such quantities; it does not build up in the tissues. Professor Ordman’s twice-daily regime may help keep blood levels of the vitamin high. But dosing on the scale followed by Pauling, who died last August aged 93, will seriously damage your bank balance—at $ 2,500 a year. 1. What do you know about Professor Ordman’s view towards vitamin C from the passage? 2. Why was the Nobel Prize winner Linus Pauling mentioned in the passage? 3. Explain in your town words the sentence from paragraph 2 “Most of it, however, goes straight down the pan”. 4. What is concluded about effects of megadoses of vitamin C in the passage?
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