Did you know that sixty per cent of your body weight is water? However,
a loss of only two per cent of this water throughdehydration(脱水) during exercise can significantly affect your performance. The more you sweat, the more your exerciseperformance declines, unless you drink enough to replace your lossof fluids.
When you lose too much water, you can overheat quite easily,especially in a warm environment.But this is not the only problemyou may face. Dehydration leads to your heart pumping muchfaster, which means exercise becomes more difficult and requiresmore effort. Despite these problems, however, many of us simplydo not take enough fluids in when we head for the gym or set outon a run.
So why is this? How do we manage to lose so much waterwithout simply drinking more toreplace it? Well, itˈs easier thanyou think. When we are at rest, we quickly become aware that weare thirsty and will put that right by having a drink. When weexercise, on the other hand, our thirstmechanism(结构) does notwork as effectively, so we donˈt notice early enough that we areactually thirsty. In fact, we only start to feel thirsty when we havealready lost around two per cent of our body weight.
Another problem is that, the more dehydrated we becomeduring exercise, the more difficult it is to prevent furtherdehydration—because our stomachs become intolerant to fluidsand we do not absorb water properly, just when we need it most.
The key thing about fluids and exercise is to manage yourintakeproperly
—regular small amounts are preferable, and someshould be drunk before the period of exercise begins. You alsoneed to match your intake to the sort of exercise you are doing. For example, for one hour of exercise, such as taking part in a 10 km run, you need to drink about two extra litres of water. For longer periods of exercise, sports drinks are recommended.
1.We know from the text that during exercise, dehydration _____.
A. can be easily avoided
B. will lead to poor performance
C. can cause many health problems
D. will be controlled whenever we drink again
2.Why do people suffer from dehydration easily during exercise?
A. Their thirst mechanism stops working. B. Their focus is on the exercise.
C. Their thirst response is slow. D. Their stomachs are full.
3.When exercising, you are advised to _____.
A. have regular breaks B. drink water accordingly
C. drink sports water in advance D. have at least two litres of water
高二英语阅读理解困难题
Did you know that sixty per cent of your body weight is water? However,
a loss of only two per cent of this water throughdehydration(脱水) during exercise can significantly affect your performance. The more you sweat, the more your exerciseperformance declines, unless you drink enough to replace your lossof fluids.
When you lose too much water, you can overheat quite easily,especially in a warm environment.But this is not the only problemyou may face. Dehydration leads to your heart pumping muchfaster, which means exercise becomes more difficult and requiresmore effort. Despite these problems, however, many of us simplydo not take enough fluids in when we head for the gym or set outon a run.
So why is this? How do we manage to lose so much waterwithout simply drinking more toreplace it? Well, itˈs easier thanyou think. When we are at rest, we quickly become aware that weare thirsty and will put that right by having a drink. When weexercise, on the other hand, our thirstmechanism(结构) does notwork as effectively, so we donˈt notice early enough that we areactually thirsty. In fact, we only start to feel thirsty when we havealready lost around two per cent of our body weight.
Another problem is that, the more dehydrated we becomeduring exercise, the more difficult it is to prevent furtherdehydration—because our stomachs become intolerant to fluidsand we do not absorb water properly, just when we need it most.
The key thing about fluids and exercise is to manage yourintakeproperly
—regular small amounts are preferable, and someshould be drunk before the period of exercise begins. You alsoneed to match your intake to the sort of exercise you are doing. For example, for one hour of exercise, such as taking part in a 10 km run, you need to drink about two extra litres of water. For longer periods of exercise, sports drinks are recommended.
1.We know from the text that during exercise, dehydration _____.
A. can be easily avoided
B. will lead to poor performance
C. can cause many health problems
D. will be controlled whenever we drink again
2.Why do people suffer from dehydration easily during exercise?
A. Their thirst mechanism stops working. B. Their focus is on the exercise.
C. Their thirst response is slow. D. Their stomachs are full.
3.When exercising, you are advised to _____.
A. have regular breaks B. drink water accordingly
C. drink sports water in advance D. have at least two litres of water
高二英语阅读理解困难题查看答案及解析
It is said that body language ________ 55 per cent of a first impression while what you say just 7 percent.
A.lies in B.accounts for
C.consists of D.goes with
高二英语单项填空中等难度题查看答案及解析
阅读下面短文,根据其内容写一篇60词左右的内容概要。
You may know that vitamin C is important to your body,but do you know that vitamin D is important to your body as well? Vitamin D has a significant role in calcium homeostasis(钙稳态) and metabolism(新陈代谢). It is sometimes called the “sunshine vitamin” because it’s produced in your skin in response to sunlight.
Vitamin D can help bones and muscles grow strong and healthy. If a person is short of vitamin D,he or she may have problems like rickets(佝偻病) and osteoporosis.Rickets is mainly found in children. Osteoporosis,the thinning of bone,is a common problem as people get older. Studies in these years have found that vitamin D may also have other uses. If someone is short of vitamin D, he may have heart problems or die from some cancers.
The easiest way to get vitamin D is from sunlight. But many people worry about getting skin cancer and skin damage from the sun. Also, even skin color has an influence. Darker skinned people get less vitamin D than lighter skinned people. Older people get less vitamin D than younger people. You can also get it from foods. Some food such as cheese and egg yolks (蛋黄) have some vitamin D.But most of vitamin D in the American diet comes from food like milk with the vitamin added.
Now more doctors are testing for vitamin D in their patients. However, some doctors worry that if people take too much vitamin D, it might be bad for their body. At the same time, skin doctors tell people to be careful with strong sunlight.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
高二英语概要写作中等难度题查看答案及解析
It is reported that fully 95 per cent of ____ US public schools are now connected to ____ Internet.
A. the; the B. the; \ C. \; the D. \; \
高二英语单项填空简单题查看答案及解析
The human body is made up of over 75%water, and we cannot live without water. Keep in mind that water is healthy and necessary for leading yourself towards better health.
Your own personal need for water can vary greatly due to exercise, weight and temperature.1. .By drinking water on a regular basis you can replenish (补充)the water in your body.
By the time you are thirsty you have already lost two or more cups of the body’s water supply.2.. Whenever you exercise, you need more water. Due to exercise, your body loses quite a bit of water. For each pound lost, you need to drink two cups of water.
3.. By drinking a glass of water before you go to sleep, you can wake up with your body functioning as it should be. When you are sick, you need more water than at any other time.4.. Therefore, you feel more thirsty than usual when you have a cold. You can try to prevent this by drinking more water at times when you become sick.5.. You should keep a bottle of water with you at all times and drink it throughout the day. You should also teach yourself to drink water instead of other drinks that don’t include the things that your body needs.
A. Always make it a habit to drink water on a daily basis
B. You should decide which the best type of water is
C. Therefore, drinking water regularly is much better than simply waiting until you are thirsty
D. Even when you lie down to sleep, your body loses water
E. When you get a cold, your body loses water quite quickly
F. There are several different opinions as to whether drinking water is actually beneficial
G. Research has proven that over two thirds of adults don’t get the water they need on a daily basis
高二英语七选五中等难度题查看答案及解析
We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body's functions, movements, emotions and thoughts. But a brain can mean so much more.
A brain can also simply be a smart person, If a person is called brainy, she is smart and intelligent. If a family has many children but one of them is super smart, you could say, "She's the brains in the family." And if you are the brains behind something you are responsible for developing or orga
nizing something. For example, Bill Gates is the brains behind Microsoft.
Brain trust is a group of experts who give advice. Word experts say the phrase "brain trust" became popular when Franklin D. Roosevelt first ran for president in 1932, Several professors gave him advice on social and political issues facing the US. These professors were called his "brain trust."
These ways we use the word "brain" all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word “drain." As a verb to drain means to remove something by letting it flow away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.
However, if people are responsible for a great idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.
If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make someone accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way.
1.According to the text, if you're the CEO of Bai Du you can be called
A. the organ of Bai Du
B. Bai Du's brain trust
C. the brain drain of Bai Du
D. the brains behind Bai Du
2.Why did Roosevelt successfully win the election?
A. Because he was smart at giving advice.
B. Because word experts were popular.
C. Because he got his brain trust.
D. Because he was the brains behind America.
3.Which of the following expression is always used in a negative way?
A. Brain trust B. Brain drain
C. Brainwash D. Brainstorm
高二英语阅读理解中等难度题查看答案及解析
We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body’s functions, movements, emotions and thoughts. But a brain can mean so much more.
A brain can also simply be a smart person. If a person is called brainy, he is smart and intelligent. If a family has many children but one of them is super smart, you could say, “He’s the brains in the family.” And if you are the brains behind something, you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft.
Brain trust is a group of experts who give advice. Word experts say the phrase “brain trust” became popular when Franklin D. Roosevelt first ran for president in 1932. Several professors gave him advice on social and political issues(问题)facing the U.S. These professors were called his “brain trust”.
These ways we use the word “brain” all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word “drain”. As a verb, to drain means to remove something by letting it flew away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country’s most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.
However, if people are responsible for a great idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.
If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make some accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way.
1.According to the text, if you’re the CEO of Bai Du you can be called .
A. the organ of Bai Du B. the brain drain of Bai Du
C. the brains behind Bai Du D. Bai Du’s brain trust
2.Roosevelt successfully won the election probably because .
A. he got his brain trust B. he got the help of word experts
C. he was smart at giving advice D. he was the brains behind America
3.From the passage, we can infer that .
A. to drain a lake means to fill it with a lot of water
B. brainy and brainwash are never used in a negative way
C. brainstorming is not a good choice for a political leader for lack of creativity
D. a country suffers a “brain drain” when educated people move to other countries
4.The author explains the “brain” expressions by .
A. making comments B. making comparisons
C. using examples D. analyzing origins
高二英语阅读理解中等难度题查看答案及解析
In 2003, eBay, a famous website ________ people buy and sell things, said that 70 per cent of their problems were with people who sold things that did not exist, or who lied about the products they were selling.
A. when B. where C. which D. what
高二英语单项填空中等难度题查看答案及解析
You’re growing up. That means you’re probably experiencing lots of changes, all at once. Your body is changing. It might even seem as if your entire self is changing. It can be confusing and even scary. 1. And it’s good!
Growing up means that you can do more, learn more, and start to make your mark on the world. In order for that to happen, your body produces chemicals called hormones that help both body and mind grow. Hormone levels change constantly, rising and falling.2. But it’s partly to blame for intense emotions, surprising reactions, and mood swings.
Because of the way your brain develops, it is somewhat ruled by emotion now and through your teen years. As a result, growing up can seem like an emotional roller coaster!3.
♦ Take care of yourself. If you eat right, sleep enough, and get good exercise, your brain will be much more able to deal with the stress.
♦ 4. When you feel your moods swinging or you’re upset, or confused, some quiet time will allow you to gather your thoughts and get calmer.
♦ Practice relaxing your body and deep breathing when you wake up and when you go to bed.5.Plus, when stuff happens during the day, you’ll be able to calm yourself quickly with a deep breath or two before you react. Your body is changing.
A. Take a time-out.
B. But the truth is, it happens to every teen.
C. Work out regularly to keep physically fit.
D. This changing is needed for your body’s development.
E. It will help you fall asleep-and start the morning right.
F. Here are a few things you can do to make the ride smoother.
G. Usually, these feelings settle down when you realize what is going on.
高二英语七选五中等难度题查看答案及解析
Did you know that reading can keep your mind active and engaged well into old age?
Several years ago when I was working as a newspaper reporter, I interviewed a woman who was a resident at a local nursing home. She was 100 years old. She read at least one book per week, mostly novels. She was bright, intelligent and fun to talk with.
“I love to read. It helps me keep up with what’s going on in the world,” she said. “A friend of mine brings me a new book every week. I look forward to her visits and I look forward to the books.”
“I can’t get around much any more,” said the 100-year-old woman, “but when I read, I can go anywhere, anytime I want. And no one has to help me!”
Reading also sets a good example for younger generations. I have observed that the best readers are those students who see their parents reading. And I’m not talking about only reading novels. Newspapers and magazines are important too. Your actions will communicate a great deal to your children and grandchildren about what you value.
But why is reading so important? In this day and age, with television to give us news, and movies and videos to keep us entertained, who needs to read?
The answer is everyone.
Developing good reading skills does not only mean that you can read a novel or a magazine, it also means being able to read and understand things like a credit card contract or an insurance policy, or the instructions for how to put a new printer to use with your computer. In addition, developing good reading skills means that you can think for yourself. You can read about the advantages and disadvantages of anything from homeschooling to taking a vacation to Ireland. And then you can make up your own mind about what’s best for you and your family.
1.The example of the 100-year-old woman is used to _______.
A. inform us of a woman who loved reading
B. show a new way of gaining information
C. find differences between books and travels
D. introduce the benefits of reading books
2.The 100-year-old woman loved reading because _______.
A. reading helped her meet her friends
B. reading could broaden her horizons
C. she wanted to escape from the real world
D. she taught her grandchildren to read
3.Who are most likely to be book lovers according to the author?
A. The kids taught by intelligent teachers.
B. The kids forced to read by their serious parents.
C. The kids influenced by book lovers around them.
D. The kids curious about the outside world.
4.We can infer form the passage that _______.
A. other media are less important than books
B. the old woman’s friend was a bookseller
C. understanding is important in reading
D. the author once worked in a nursing home
5.In which part of a newspaper would the passage be most likely to appear?
A. Business B. Lifestyle C. Travel D. History
高二英语阅读理解中等难度题查看答案及解析