Vitamin D is necessary for bone-building, imm...

Vitamin D is necessary for bone-building, immune function, blood sugar control, positive mood and more. 1. The lower your vitamin D level is, the higher your risk of death from ally cause will be. However, it’s not a great idea to just take a supplement (补品) off the drugstore shelf and start taking it.

Since many of us have an inadequate amount vitamin D, also known as the “sunshine vitamin”, doctors will often give us high levels of D supplements, with doses ranging from 2,000 to 10,000 IU (International Units) per day, up to 50,000 IU per week and sometimes even more. 2. Very big doses ( 剂量) of vitamin D can cause a build-up of calcium ( 钙) in the blood, which leads to poor appetite, weakness, weight loss or other diseases. Here’s the bigger issue: 3. A build-up of stored vitamin D cart cause avoidable problems, leading to problems such as kidney stones.

4. The National Institutes of Health set the Recommended Dietary Allowance for vitamin D at 600 IU daily for babies, children, and adults up to 70 years old. Adults aged 71 and older need 800 IU, since the ability to absorb vitamin D drops with age. Because the fat cells take vitamin D up, making it less available for use by tile body, 5.

Though you’ll get a bit of vitamin D from foods—including fatty fish, beef liver, cheese, milk and so on—the amounts are so small that there’s little need to worry that they’ll put you over the daily dose.

A.It can help prevent many diseases.

B.We can actually reduce the risk of death.

C.people who are fat may also need more vitamin

D.any extra intake of vitamin D can get stored in the body.

E.But like all good things, it’s possible to get too much of it.

F.The average daily recommended amounts vary based on your age.

G.Vitamin D should be supplemented carefully despite its importance.

高三英语七选五中等难度题查看答案及解析

Vitamin D is essential for bone-building,cognitive function,joint health,immune function,blood sugar control, positive mood and more.It can help prevent many diseases.Some studies suggest that the lower your vitamin D level is,the higher your risk of death from any cause will be.However,it's not a great idea to just grab a supplement（补充物）off the drugstore shelf and start taking it.

Since many of us are deficient in vitamin D,also known as the "sunshine vitamin”,doctors will often give us a prescription（处方）for high levels of vitamin D supplements,with doses ranging from 2,000 to 10,000 IU (International Units) per day,up to 50,000 IU per week,and sometimes even more.But like all good things,it's possible to get too much of it."Very big doses of vitamin D can cause a build-up of calcium in the blood,which leads to nausea,vomiting,poor appetite,weakness,and weight loss,"says Madeline Basler of Real You Nutrition.Here's the bigger issue: any extra intake of,vitamin D can get stored in the body."A build-up of stored vitamin D can cause avoidable problems,"says Marra Francis,Medical Director at Everly Well,"leading to problems such as kidney stones."

The average daily recommended amounts vary based on your age.The National Institutes of Health set the Recommended Dietary Allowance for vitamin D at 600 IU daily for infant,children,and adults up to 70 years old. Adults aged 71 and older need 800 IU,since the ability to absorb vitamin D drops with age.People who are obese may also need more vitamin D because the fat cells take it up,making it less available for use by the body.In winter when you're getting less sun exposure,some experts say it's safe to take daily doses of around 1,000 to 2,000 IU without any risk of complications（并发症）.

Though you'll get a bit of vitamin D from foods—including fatty fish beef liver,cheese,egg yolks and mushrooms,plus fortified foods like milk,orange juice,and cereal—the amounts are so small that there's little need to worry that they’ll put you over the daily does.

1.What can we infer from Paragraph 1?

A. We can actually reduce the risk of death.

B. People don't really know vitamin D well.

C. Vitamin D supplements are necessary for everyone.

D. Vitamin D should be supplemented carefully despite its importance.

2.The underlined part "are deficient in" in Paragraph 2 probably means “　　　　 ”.

A. having an inadequate amount of　　 B. paying much attention to

C. being interested in　　 D. being concerned about

3.How much vitamin D should a healthy 60-year-old lady take daily in summer?

A. About 800 IU.　　 B. About 600 IU.

C. No less than 1,000 IU.　　 D. No less than 5,000 IU.

4.What does the last paragraph mainly talk about?

A. What other ways people can take to get vitamin D.

B. What foods we should eat every day to balance our diets.

C. Whether daily foods would overdose people with vitamin

D. D.Whether vitamin D can be supplemented by the foods we eat.

高三英语阅读理解中等难度题查看答案及解析

All people need to sleep. Sleep is a necessary process that promotes proper body functioning and can improve the quality of your life. Not only is the quantity of sleep important, but also the quality of sleep.

Your bedroom should be shaped to your taste and to allow you to sleep in a peaceful environment. One of the biggest mistakes people make in their sleep is to use their bedroom for activities other than sleep. If your bedroom also functions as a command station for your life and work, the likelihood of your sleeping being poor is rather high. Bedrooms should be designed, decorated and used for mainly sleep. TVs, computers and other things should not be in your bedroom if at all possible.

Establishing regular sleeping and waking times can help improve the quality of your sleep especially for those suffering from sleeplessness. Avoid hot food, caffeine, sugar and alcohol at least 4 to 6 hours before your sleep time. Develop a regular exercise program. Proper exercise and nutrition will help improve sleeping patterns. However, avoid exercising 2 hours before sleeping, since this may stimulate your body and make sleeping more difficult.

Establish a pre-bedtime rule that will help focus you on sleep. You can try meditation（沉思）,reading or deep breathing and relaxation. Your bedtime rule should be yours. Do not worry about it fitting into a specific category. Do what is the best for you.

Things such as room temperature, noise and light levels and even your bed mattress can have a lot of effect on the quality of sleep that you experience. Block out distracting noises and lights. You are in your bedroom to sleep and not be distracted by environmental interferences（干扰）.

1. According to the author, ________.

2.If you have sleep problems, __________.

3.The following sentences are true EXCEPT ______.

4.The main idea of the last paragraph is _______.

高三英语阅读理解中等难度题查看答案及解析

All people need to sleep. Sleep is a necessary process that promotes proper body functioning and can improve the quality of your life. Not only is the quantity of sleep important, but also the quality of sleep.

Your bedroom should be shaped to your taste and allow you to sleep in a peaceful environment. One of the biggest mistakes people make in their sleep is to use their bedroom for activities other than sleep. If your bedroom also functions as a command station for your life and work, the likelihood of your sleeping being poor is rather high. Bedrooms should be designed, decorated and used for sleep mainly. TVs, computers and other things should not be in your bedroom if at all possible.

Establishing regular sleeping and waking times can help improve the quality of your sleep especially for those suffering from sleeplessness. Avoid hot food, caffeine, sugar and alcohol at least 4 to 6 hours before your sleep time. Develop a regular exercise program. Proper exercise and nutrition will help improve sleeping patterns. However, avoid exercising 2 hours before sleeping, since this may stimulate your body and make sleeping more difficult.

Establish a pre-bedtime rule that will help you focus on sleep. You can try deep thought，reading or deep breathing and relaxation. Your bedtime rule should be yours. Do not worry about it fitting into a specific category. Do what is best for you.

Things such as room temperature, noise and light levels and even your bed mattress(床垫) can have a lot of effect on the quality of sleep that you experience. Block out distracting noises and lights. You are in your bedroom to sleep and not be distracted by environmental interferences.

1.Which of the following is the best title for the text?

A. How to Deal with Sleep Problems

B. What is the Process of Sleep

C. Where Should We Sleep

D. How to improve Sleep Quality

2.According to the author, 　　　　

A. The bedroom has many functions than expected

B. Computers can make people sleep fast

C. The bedroom is better used only for sleep

D. Amusements are forbidden in the bedroom by law.

3.If you have sleep problems,　　　

A. A well-decorated bedroom is important to you

B. You’d better have steady sleeping and waking time

C. Cold food and sugar are good for you

D. You need proper exercise just before sleep

4.The main idea of the last paragraph is 　　　 　　　

A. a good sleep environment contributes to good sleep

B. blinding lights can make for a good sleep

C. bed mattress plays a key part in sleep

D. distracted people are sleepless

高三英语阅读理解中等难度题查看答案及解析

_______naturally by the skin when exposed to sunlight, Vitamin D is needed for healthy bones, teeth and muscles.

A. Making　　 B. To make

C. Made　　 D. Make

高三英语单项填空困难题查看答案及解析

Organic exercise is a good fit for people looking to train functionally. It is defined as exercise that is similar to the type of physical activity performed by ancient hunter-gatherer ancestors. Organic exercise is generally preformed in natural or outdoor settings. 1.Organic exercise may include such activities as walking, jogging, swimming, hiking or rock climbing.

When it comes to organic exercise, one of its most significant benefits is its limited reliance on equipment. 2.Going for a jog, walking, or even hiking does not require tools, weights, or even hiking does not require tools, weights, or other products, and therefore, is fairly inexpensive.

Since the types of activity emphasized in organic exercise programs are similar to those performed as part of daily life, they do not require extensive or long amounts of practice to obtain proficiency(精通). 3.Therefore the type of activity recommended in an organic workout routine can be performed by beginning or advanced exercisers alike with relative ease.

While the type of exercise recommended in an organic workout may be easy enough to perform, the intensity at which it is recommended can be too much for some individuals. 4.Individuals who are new to exercise or suffer from a chronic health condition that limits their physical ability may find it difficult to perform exercise that is especially strenuous.

5.Individuals who are new to exercise may want to talk with their health care provider before choosing this type of activity. In some cases, it may be better to start off with a more traditional workout and slowly transition to organic exercise than starting with this regimen(养生法)right off the bat.

A. Weigh both the benefits and drawbacks.

B. In fact, it can be done nearly anywhere, any time.

C. Therefore it requires very little helping equipment.

D. Choosing the right types of organic exercise is important.

E. Most adults already know how to hike, swim or dig, for example.

F. In fact, one of the biggest drawbacks is the emphasis on high-intensity exercise.

G. While organic exercise may be a good choice for some, it is right for all adults.

高三英语七选五中等难度题查看答案及解析

For little kids, drawing is ____.

高三英语单项填空中等难度题查看答案及解析

Speaking in public meetings is necessary for many students and employees. As well, it is a difficult task for them, especially for non-native speakers. A great many researchers have made efforts to help foreign language learners to improve the approaches.

Charles LeBeau is a public speaking professor and consultant. Currently, he teaches at two universities and at the Toshiba International Training Center. He has also written books on the subject. English language learners around the world use his book Speaking of Speech.

In Speaking of Speech Mr. LeBeau says a simple approach helps the learners. So, the professor divides public speaking into three parts: the physical message, the visual message, and the story message. He says, “The central thing to remember about public speaking or presentation is that it’s a very complex communicative activity. For non-native speakers it’s a really scary activity. So to make that more simplistic and easy for them, the approach that I’ve taken is to simplify and break it down. First if we look at presentation, what’s going on? There are basically three messages that the presenter is giving the audience at the same time. There’s what I call the physical message, namely body language. It’s the way that my body, as a speaker, is talking to the audience. Then there’s also the visual message. The visual messages are the slides that we now make and show the audience. The third message is the story message, which is the content of our presentation. The story message is the verbal message, what we say to the audience. The story message also includes how we organize our ideas to present to the audience.”

He says the simple approach to breaking down the parts of public speaking has proved itself. He says learners improve quickly and do a good presentation after a few days of study.

1.What does Mr. LeBeau think of public speaking?

A. Public speaking is a simple task.

B. Public speaking is divided into three parts.

C. Public speaking is a tough communicative activity.

D. Public speaking is necessary for students and employees.

2.From Mr. LeBeau’s point, which of the following is the key way to help speakers?

A. Studying a few days.

B. Simplifying the speech.

C. Using slides and physical language.

D. Reading his book Speaking of Speech.

3.Which of the following provides the visual message?

A. Gestures; videos; ideas.

B. Slides; feelings; videos.

C. Photos; ideas; gestures.

D. Videos; slides; photos.

高三英语阅读理解中等难度题查看答案及解析

Recycling is very important and necessary in today’s world. The most important reason for this is that human progress and industry have made it possible for people to have lots of things, and when people have many material possessions, they are bound to throw some of them away. ___1.___

Recycling is a way for us to keep the world clean as items are broken down and used again, preventing the littering of the environment. Instead of throwing all your garbage into the dustbin, you should separate paper, metal, glass, and plastic into different containers. ___2._ They can be turned into valuable compost, which is the perfect plant food and soil disease fighter.

___3.___ You can see if an item has been made from recycled materials by its label. If it’s been recycled, it will say so. Also instead of always buying new clothes, you can arrange to have a clothing exchange with your friends. You bring clothes you don’t want and pick items you want from what other people have brought. Not only does this save the environment, but it also saves your money. ___4.___ This saying can be applied to all sorts of things: books, CDs, furniture, etc. Also try shopping at second-hand stores, because they often have lots of items still in good shape for you to choose.

Many countries have made it easy for people to recycle, as alongside the normal garbage trucks, special garbage trucks come and pick up recyclables. However, in some countries the responsibility is left up to the ordinary people to recycle. ___5.__ Recycling represents just one way in which we can help the environment. But it is an effective one and one that we can actively influence.

A. Fallen leaves can also be recycled.

B. Having too many things causes a lot of garbage.

C. You should try to buy products that have been recycled.

D. Products made with recycled materials are as good as new products.

E. This creates a lot of garbage which in turn destroys the environment.

F. Remember, what is one person’s unwanted object can be someone else’s treasure!

G. Therefore, it needs attention in society so we can continue to make our environment livable.

高三英语七选五中等难度题查看答案及解析

A wise man once said that the only thing necessary for the victory of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people. Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.

Accountability isn’t hard to define. It means that every person is responsible for his or her actions and liable for their consequences.

Of the many values that hold civilization together --- honesty, kindness, and so on --- accountability may be the most important of all. Without it, there can be no respect, no trust, no law --- and, ultimately, no society.

My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people’s behavior are far less effective than internal restraints such as guilt, shame and embarrassment.

Fortunately there are still communities --- smaller towns, usually --- where schools maintain discipline and where parents hold up standards that declare: “In this family certain things are not tolerated --- they simply are not done!”

Yet more and more, especially in our larger cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you annoy him.

The main cause of this breakdown is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it’s the criminal who is considered victimized: by his underprivileged (被剥夺基本社会权利的) upbringing, by the school that didn’t teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn’t provide a stable home.

I don’t believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything. We in America desperately need more people who believe that the person who commits a crime is the one responsible for it..

1.What the wise man said suggests that it’s __________.

A. unnecessary for good people to do anything in face of evil

B. certain that evil will be widespread if good men do nothing about it

C. only natural for good men to defeat evil

D. desirable for good men to keep away from evil

2. According to the author, if a person is found guilty of a crime, ________.

A. society is to be held responsible　　　　　　　

B. modern civilization is responsible for it

C. the criminal himself should bear the blame

D. the standards of living should be improved

3.　 Compared with those in small towns, people in large cities have ________.

A. less self-discipline　　         　　　　　　　　　 B. better sense of discipline

C. more respect to each other　　     　　　　　　 D. less effective government

4. The writer is sorry to have noticed that ________.

A. people in large cities tend to excuse criminals

B. people in small towns still stick to old discipline and standards.

C. today’s society lacks sympathy for people in difficulty

D. people in disadvantaged circumstances are engaged in criminal activities

5. The key point of the passage is that ________.

A. stricter discipline should be maintained in schools and families

B. more good examples should be set for people to follow

C. more attention should be paid to people’s behavior

D. more people should accept the value of accountability

高三英语阅读理解中等难度题查看答案及解析