题目内容

6.In the dead of winter,we don't typically think about spending time outdoors,but according to many physicians we should.The sun is our greatest source of a vitamin that is essential for good health-Vitamin D.
This important vitamin strengthens bones and teeth and is linked to the prevention of heart disease,cancer and many other life-threatening diseases.The recommended daily requirement is 400-600 International Units (IU).In summer,people with dark brown eyes and darker skin turn sunlight from just 15 minutes outside without sunscreen into adequate amounts of Vitamin D.
Even during winter,just a 10-minute walk midday can keep the body's Vitamin D at healthy levels.During brief winter walks,we receive the greatest benefits when we wear no sunscreen and expose as much skin to the sun as possible.
Vitamin D can also be obtained from foods.Salmon is one of the best sources of the Vitamin.Egg yolks(蛋黄),cheese,mushrooms and some animals organs contain smaller quantities of it.
To attract consumers,food companies add Vitamin D to some of their milk products.The practice of putting the Vitamin into milk began in the 1930s.At that time,many children were suffering from rickets,an illness that is caused by a Vitamin D deficiency(不足).It made the children's bones soft and weak.Adding Vitamin D to milk helped to solve the problem,and it has been available ever since.
For people who still need more Vitamin D,there is another option:take Vitamin D supplements(补充).These products are widely sold in stores.However,anyone considering taking supplements should consult a physician first.

4.During the winter months,peopleC.
A.aren't able to meet their deadlines
B.often don't dress warmly enough
C.generally like to remain indoors
D.leave lots of work for others to do
5.According to the text,Vitamin DA.
A.can be obtained by being exposed to the sun
B.can be used to cure life-threatening diseases
C.can be mainly found in some milk products
D.can make the children's bones soft and weak
6.Why is salmon mentioned in this article?B
A.It's seldom prepared in the correct way.
B.It's a useful addition to a person's diet.
C.It has a huge impact on the environment.
D.Its advantages have been exaggerated.
7.The main purpose of this article isA.
A.to introduce a valuable nutrient
B.to advertise Vitamin D supplements
C.to note risks associated with a nutrient
D.to explain how a nutrient was discovered.

分析 本文通过各种途径来介绍人们可以获得维生素D,可见写作的目的是向人们介绍有价值的营养.

解答 4.C 细节理解题.根据句子In the dead of winter,we don't typically think about spending time outdoors在冬天,我们通常不会想到在户外消磨时间.
5.A 细节理解题.根据句子The sun is our greatest source of a vitamin that is essential for good health-Vitamin D.太阳是我们健康维生素D必不可少的维生素的最大来源.所以答案选A.
6.B细节理解题.根据句子Vitamin D can also be obtained from foods.Salmon is one of the best sources of the Vitamin.维生素D也可以从食物中获取.鲑鱼是维生素的最佳来源之一.所以答案选B.
7.A 写作意图题.本文通过各种途径来介绍人们可以获得维生素D,可见写作的目的是向人们介绍有价值的营养,所以答案选A.

点评 本文考查细节题为主,细节题可以在文章中直接找到与答案有关的信息?或是其变体.搜查信息在阅读中非常重要它包括理解作者在叙述某事时使用的具体事实、数据、图表等细节信息.在一篇短文里大部分篇幅都属于这类围绕主体展开的细节.做这类题一般采用寻读法?即先读题,然后带着问题快速阅读短文,找出与问题有关的词语或句子,再对相关部分进行分析对比,找出答案.

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