题目内容
4.Now,we know that if we do not get enough vitamins,we are at risk of developing a number of diseases.As a result,vitamin supplements(补品),though expensive,are popular with people who worry that they are not getting enough vitamins from the foods they eat.But contrary to what many people think,medical experts have found little evidence that most supplements do anything to improve health or protect against disease.In fact,medical experts warn that taking too many of some vitamins can be harmful.For example,too much vitamin E can cause bleeding.People should discuss what vitamins they take with their doctors,as some vitamins can produce harmful side effects when mixed with medicines.
Experts,however,say that sometimes vitamins can help prevent disease.People who know they lack a particular vitamin should take vitamin supplements.Some older adults,for example,may not have enough vitamin B-twelve.This is because,as people get older,their body loses its ability to take it from foods.Also,people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight.
Different vitamins are found in different foods.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-twelve is found in green leafy vegetables and other foods,like fruits.Vitamin K can be found in pork products.
In fact,for most people,a balanced diet can ensure enough of the vitamins our bodies need.So,it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need.
4.What is probably talked about before this passage?C
A.How many vitamins a person's body needs.
B.How many vitamins some foods contain.
C.The benefits that vitamins bring to our health.
D.What people should do to stay healthy.
5.Vitamin supplements are popular with people becauseD.
A.people mistakenly think that they are good for their health
B.they contain more vitamins than the foods people eat
C.food does not provide enough vitamins people need
D.people fear that a lack of vitamins will lead to disease
6.From the passage,we can learn that medical experts advise peopleD.
A.never to take any vitamin supplements
B.to depend only on food for their vitamins
C.not to take any vitamins together with medicines
D.to consult doctors before taking vitamin supplements
7.For people who lack Vitamin B-twelve,they can eat more fromB.
A.sweet potatoes
B.green leafy vegetables
C.pork products
D.eggs.
分析 文章讨论的是如何通过平衡的饮食获得维生素,以及不同维生素的来源.
解答 4.C.推断题.由第一句Now,we know that if we do not get enough vitamins,we are at risk of developing a number of diseases,现在我们已经知道如果我们得不到足够的维生素,我们就有可能患上多种疾病,可推知上文讲的是维生素对健康的益处,故选C.
5.D 细节题.根据文章第一句Now,we know that if we do not get enough vitamins,we are at risk of developing a number of diseases.如果我们得不到足够的维生素,我们就有可能患上多种疾病.可知D正确.
6.D 细节题.根据第2段内容People should discuss what vitamins they take with their doctors,可知服用维生素补充剂要咨询医生,故D正确.
7.B 推理题.根据倒数第2段Vitamin B-twelve is found in green leafy vegetables and other foods,like fruits.可知缺少维生素B的人可以吃绿叶蔬菜和水果来补充,故B正确.
点评 本篇文章内容比较适中,对于考生的能力要求不高,只要认真细致阅读,不难发现答案.可以先看题目再读文章,这样可以提高阅读的速度.还要准确定位考点.特别是推理题,要结合上下文的暗示做题,掌握方法是关键.
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