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题型:阅读理解-阅读单选 难度:0.65 引用次数:108 题号:4102808
Scientists have discovered thirteen kinds of vitamins. They say vitamins help to carry out chemical changes within cells. If we do not get enough of the vitamins we need in our food, we are at risk of developing a number of diseases. Which foods should be eaten to keep us healthy? Let us look at some important vitamins.
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 and the yellow part of eggs.
Vitamin B-1 is also called thiamine. Thiamine changes starchy(含淀粉的)foods into energy. Thiamine is found not just in whole grains like brown rice, but also in beans and peas, nuts, and meat and fish.
Vitamin B-12 is needed so folic acid can do its work. Together, they help produce red blood cells. Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy. Vitamin B-12 is found naturally in foods like eggs, meat, fish and milk products. Vitamin B-12 is found in green leafy vegetables and other foods, like legumes and citrus fruits (柑橘类水果).
Vitamin C is needed for strong bones and teeth. The body stores little vitamin C. So we must get it every day in foods such as citrus fruits, tomatoes and uncooked cabbage.
Vitamin D prevents the children’s bone disease rickets (佝偻病). 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. It can also be found in pork products, liver and in vegetables like cabbage, kale and spinach (菠菜).
Vitamins are important to our health. A lack of required vitamins can lead to health problems.
1. What is the main idea of the passage?
A.There are thirteen kinds of vitamins in total.
B.One can not live without enough vitamins.
C.Vitamins can carry out chemical changes within cells.
D.Enough vitamins are vital to keep healthy.
2. Women who wish to become mothers should take in ________.
A.vitamin AB.vitamin B-1
C.vitamin B-12D.vitamin C
3. What can change a substance in the skin into vitamin D?
A.Fish liver oil.
B.Ultraviolet light from the sun.
C.Fresh milk drunk by people.
D.Doing a certain amount of exercise.
4. According to the passage, taking in enough vitamin C can ________.
A.make our eyesight better
B.help to stop bleeding
C.make our bones and teeth strong
D.help produce red blood cells
【知识点】 个人保健 说明文

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【推荐1】In summer the extreme heat often makes people sweaty and restless. While people are annoyed by it, experts suggest summer is the best season to discharge (排放) your body’s toxins (毒素) and recover your energy.

One popular option is hot-stone massage (按摩). Therapists use smooth and heated stones, usually river rocks, to massage certain parts of the body, or place them on key points of the body. The warmth of the hot stones will improve blood circulation and also help relax muscles, while sweating is also believed to be good for discharging the body’s toxins.

Another popular option is hot-stone baths. The hot-stone bath will help the body discharge toxins and humidity that accumulated during the last winter. Summer is the best season to build a good body. Rather than use water or steam to heat and wash the body, people simply wear a coat or something comfortable, and then lie on heated stone tablets made of hot stones, which are warmed to around 45oC. The body will gradually warm up and blood circulation will also be improved. More sweat will come out quickly. The sweat is smooth and fresh, not smelly like that released after sports activities. Such baths bring a number of health benefits, such as anti-aging, improved blood circulation and stress relief. The slimming effect of dieting can even be promoted.

Using hot stones for healing dates back to ancient times, but the modern renewal of hot-stone massage is generally credited to Mary Nelson, a native of Tucson, Arizona, America, whose trademark is “LaStone Therapy”.

The therapy is gaining wide popularity with many people, especially those who have jobs in cool air-conditioned rooms. The hot-stone therapy can help cure many diseases, including back pain.

1. What do people use to release toxins in our body according to the text?
A.Washing the body with cold water.
B.Discharging lots of sweat.
C.Relaxing muscles
D.Lying on the warm beds.
2. What can we know from the text?
A.Sports have greater effects on the health than hot-stone massage.
B.There are no toxins and humidity in the body in summer.
C.Using water of about 45oC to wash the body is good for the health.
D.People should take advantage of summer to improve their health.
3. What can be learned about the hot-stone therapy?
A.It was invented by Mary Nelson, an American.
B.It successfully cured many people of cancer.
C.It is popular with people with its excellent effects.
D.It can help people avoid sweating too much in hot summer.
4. Which of the following could be the best title for the text?
A.The origin and development of the hot-stone therapy
B.The amazing functions of the hot-stone therapy
C.A healthy and comfortable lifestyle
D.How to live comfortably in summer
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文章大意:本文是一篇说明文。文章主要介绍了一些在生活中要养成的好习惯,比如爬楼梯、多喝水以及早点休息等。

【推荐2】Simple Health Habits Worth Adopting Into Your Life

We get it that it’s hard to break bad habits. But when it comes to building healthy habits, small decisions add up over time.

Use stairs. If you have stairs at your home or office, take them every chance you get.     1     For a strong cardio (有氧) workout, you can walk up and down the stairs repeatedly. Start with a limited number of repetitions and then increase them as you feel stronger.

Drink one extra glass of water a day. It’s nothing new that there are health benefits to drinking more water.     2     If plain water isn’t your favorite, you can add flavor to your water to help up your intake.

Correct your posture. When you were a kid, have your parents ever yelled at you for having bad posture? Well, the bad news is that they were right.     3     Not only that, but good posture prevents backache. You can try to leave yourself a note to sit up straight until it becomes an unconscious habit. Walking with your shoulders back and head held high can also make you feel good about yourself.

    4     Solid sleep doesn’t just give you more energy, it can also help with healthy eating goals. If you have difficulty falling asleep, try to head to bed thirty minutes earlier than your usual time. Wind down with a book. You’ll be falling asleep in no time.

Remember that building new healthy habits can take some time and it’s OK to treat yourself to avoid feeling deprived (剥夺). Stay focused on your goal.     5    

A.Don’t stop there, though.
B.Change your bad sleep habits.
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F.But we ignored their warning to correct bad posture.
G.It helps keep your temperature normal and gets rid of wastes.
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【推荐3】At first, I didn’t recognize the symptoms that we all had in common. Friends mentioned that they were having trouble concentrating. It wasn’t burnout — we still had energy. It wasn’t depression — we didn’t feel hopeless. We just felt somewhat joyless and aimless.

It turns out there’s a name for that: languishing.

Languishing is a sense of inactivity and emptiness. It feels as if you’re muddling (应付) through your days, looking at your life through a foggy windshield (挡风玻璃).

In psychology, we think about mental health on a spectrum (范围) from depression to flourishing (精力旺盛). Flourishing is the peak of well-being, with depression being the valley and languishing the neglected middle child of mental health. It’s the emptiness between depression and flourishing — the absence of well-being. You’re not functioning at full capacity. Languishing dulls your motivation, disrupts your ability to focus, and greatly increases the possibility that you’ll cut back on work.

Part of the danger is that when you’re languishing, you might not notice the dulling of delight or the decreasing of drive. You don’t catch yourself slipping slowly into aloneness; you’re indifferent to your indifference. When you can’t see your own suffering, you don’t seek help or even do much to help yourself.

So what can we do about it? People who became more focused on their work managed to avoid languishing. Interrupted attention is an enemy of engagement and excellence. To go beyond languishing, give yourself some uninterrupted time. It clears out constant distractions (分心) and gives us the freedom to focus. And try starting with small wins by focusing on a challenge that matters to you — an interesting project, a worthwhile goal, or a meaningful conversation.

Psychologists still have a lot to learn about what causes languishing and how to cure it, but naming it might be a first step. It could help to defog our vision, giving us a clearer window into what had been an unclear experience. It could remind us that we weren’t alone: languishing is common and shared.

By acknowledging that so many of us are languishing, we can start giving voice to quiet despair and lighting a path out of the emptiness.

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B.become weaker or failing to improve
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D.Be indifferent to your lack of enthusiasm.
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B.We can continue to learn more about languishing.
C.We can see it as basically the same as depression.
D.We can study it as the complete opposite of flourishing.
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