Green vegetables nutrients, vitamin A and C.A...

Green vegetables　　　　 nutrients,　　　　　 vitamin A and C.

A. include; contain　　 B. include; containing　　

C. contain; include　　 D. contain; including

高二英语单项填空中等难度题查看答案及解析

---- Water can dissolve almost anything and give nutrients to creatures.

---- Yes, and that’s one of its ______.

高二英语单项填空简单题查看答案及解析

---- Water can dissolve almost anything and give nutrients to creatures.

---- Yes, and that’s one of its ______.

A. characters        B. properties        C. qualities         D. ability

高二英语单项填空中等难度题查看答案及解析

One Story

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1.One Story judges works mainly according to __________.

A.readers’ views on them B.the number of their words

C.whether they are translated works D.where and how they are published

2.What should participants pay attention to?

A.They should expect no profits or comments.

B.They should apply for an account in advance.

C.They should provide detailed personal information.

D.They should have experience of publishing works.

3.What can we infer from the passage above?

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C.One Story aims at making money for readers and organizations.

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高二英语阅读理解简单题查看答案及解析

Vitamin D helps bones and muscles grow strong and healthy. Low levels of vitamin D can lead to diseases such as rickets (佝偻病), mainly found in children. The thinning of bone is a common problem as people, especially women, get older.

But more and more research is suggesting that vitamin D might also help prevent many diseases. The easiest way to get vitamin D is from sunlight. The sun’s ultraviolet (紫外线的) rays react with skin cells to produce vitamin D. But many people worry about getting skin cancer and skin damage from the sun. As a result they stay out of the sun. Also, darker-skinned people produce less vitamin D than lighter-skinned people. The amount also decreases in older people and those living in northern areas that get less sunlight.

Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish and fish liveroils (鱼肝油). Farmed fish have only about one-fourth as much vitamin D as wild fish. Small amounts of vitamin D are found in beef liver, cheese and egg yolks. But most of the vitamin D in the American diet comes from foods such as milk.

Research in the last several years has shown that low levels of vitamin D may increase the risk of heart attacks in men and deaths from some cancers. More doctors are now having their patients tested for their vitamin D levels. But as research continues, some experts worry that if people take too much vitamin D, it might act as a poison. Also, skin doctors warn people to be careful with sun exposure because of the risk of skin cancer.

1.The first paragraph is mainly about 　　　.

2.Which of the following people produce the least amount of vitamin D?______

3. People can get the most vitamin D from 　　　.

4.What can we infer from the text?_________

A. Being exposed to sunlight is the safest way to get vitamin D.

B. Lack of vitamin D can make people age quickly.

C. Proper vitamin D levels people need are still not determined now.

D. The vitamin D level is higher in men than in women.

高二英语阅读理解困难题查看答案及解析

_____by a greater demand for vegetables, farmers have built more green houses.

高二英语单项填空中等难度题查看答案及解析

______ by a greater demand of vegetables, farmers have built more green houses.

A. Driven             B. Being driven         C. To drive        D. Having driven

高二英语单项填空中等难度题查看答案及解析

______ by a greater demand of vegetables, farmers have built more green houses.

A. Driven             B. Being driven         C. To drive           D. Having driven

高二英语单项填空简单题查看答案及解析

Today, we know that the role of vitamins and minerals goes way beyond the prevention of deficiency diseases (维生素缺乏症) to actually preventing cancer and heart disease, the most fearsome killers of our time. With this knowledge has come the widespread call for nutritional supplementation (营养补充) — and a confusing group of vitamin, mineral, and supplements lining the supermarket shelves.

Far from contributing to better health, however, nutritional supplements threaten to turn a scientific breakthrough into a nutritional disaster.

Promoters of vitamins and minerals — especially vitamins A, C, and E— would have consumers believe that the little vitamin pill in the bottle is all they need for good health. Take your vitamins in the morning, and you’re covered. It’s okay to eat fast foods for the rest of the day or skip meals to achieve today’s fashionably skinny look. But vitamins and minerals are only one part of the nutritional puzzle. A diet rich in fiber (纤维) and balanced in carbohydrates and protein is essential for good health. You can’t get these things from a nutritional supplement. The focus on vitamin and mineral supplements may actually be robbing us of the full nutrition we seek.

And no supplement can compare to the quality of nutrition found in natural sources. For example, our bodies turn carotenes (胡萝卜素) from plant foods into vitamin A. Many supplements contain a single carotene, but natural sources are rich in many different carotenes. Many supplements contain a form of vitamin E that is made from chemicals, when natural vitamin E is more readily absorbed and used by the body. And science is still discovering the wealth of nutrients in foods.

You’d be hard-pressed to find a supplement as nutritionally comprehensive and powerful as a balanced diet. Even if you could, you’d pay much more than if you got the same nutritional value from natural sources.

But perhaps the greatest danger presented by nutritional supplements comes from the very real risks presented by self-medication. Anyone can walk into the market and buy as many different supplements as desired. The reported benefits of high dosages of certain nutrients have led some people to believe that the more the better. Many take several vitamin and mineral supplements without regard to possible consequences.

Surprising new research suggests that vitamin C pills may speed up hardening of the arteries, the underlying cause of heart attacks. Researchers said their findings support the recommendations of health organizations, which urge people to avoid high doses of supplements and to get their nutrients from food instead.

As appealing as they’re made to sound, nutritional supplements are danger in disguise. If you’re looking for good health, don’t look on the supplement shelves of your supermarket. Look in the produce section instead.

1.What has given rise to the great need for nutritional supplements?

A. The knowledge of deficiency diseases.

B. The low prices of nutritional supplements.

C. The frighteningly high death rate from cancer and heart disease.

D. The information about the role of vitamins and minerals in health.

2.The “promoters” (Paragraph 3) most probably refers to ________.

A. businessmen        B. doctors        C. scientists        D. fast food lovers

3.According to the passage, nutritional supplements ________.

A. are made from chemicals

B. are ineffective in supplying fiber

C. provide too much vitamin C

D. contain a kind of dangerous carotene

4.By describing nutritional supplements as “danger in disguise” in the last paragraph, the writer means that they are ________.

A. of little help

B. of poor quality

C. potentially harmful

D. extremely poisonous

高二英语阅读理解中等难度题查看答案及解析

Try to eat food groups _　　 _ vitamins A, C and E—they will do lots of good to your eyesight.

A. containing　　　　　 B. contained

C. to contain　　　　　 D. to be contained

高二英语单项填空中等难度题查看答案及解析