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题型:阅读理解-阅读单选 难度:0.65 引用次数:64 题号:14082090

Many scientists believe our love of sugar may actually be an addiction. When we eat or drink sugary foods, the sugar enters our blood and affects the parts of our brain that make us feel good. Then the good feeling goes away, leaving us wanting more. All tasty foods do this, but sugar has a particularly strong effect. In this way, it is in fact an addictive drug, one that doctors recommend we all cut down on.

“It seems like every time I study an illness and trace a path to the first cause, I find my way back to sugar, says scientist Richard Johnson. One-third of adults worldwide have high blood pressure, and up to 347 million have diabetes (糖尿病). Why? “Sugar, we believe, is one of the culprits, if not the major culprit,” says Johnson.

Our bodies are designed to survive on very little sugar. Early humans often had very little food, so our bodies learned to be very efficient in storing sugar as fat. In this way, we had energy stored for when there was no food. But today, most people have more than enough. So the very thing that once saved us may now be killing us.

So what is the solution? It's obvious that we need to eat less sugar. The trouble is, in today's world, it's extremely difficult to avoid. From breakfast cereals to after-dinner desserts, our foods are increasingly filled with it. Some manufacturers even use sugar to replace taste in foods that are advertised as low in fat. So while the foods appear to be healthier, large amounts of sugar are often added.

But some people are fighting back against sugar and trying to create a healthier environment. Many schools are replacing sugary desserts with healthier options, like fruit. Other schools are trying to encourage exercise by building facilities like walking tracks so students and others in community can exercise. The battle has not yet been lost.

1. What is the passage mainly about?
A.Our addiction to sugar.
B.Illnesses caused by sugar.
C.Ways to avoid sugar.
D.Why food suppliers add sugar.
2. What does the underlined word “culprit” mean in the second paragraph?
A.Disease.B.Sweet food.
C.A solution.D.Cause of the problem.
3. According to the passage, why is it so hard to avoid sugar?
A.It gives us needed energy.
B.It makes us energy efficient.
C.We get used to eating it at school.
D.It's in so many foods and drinks.
4. Which of the following is true according to the passage?
A.Our bodies need to store much sugar as fat.
B.We need very little sugar to survive.
C.Early humans ate more sugar than we do today.
D.Food suppliers are using fruit to replace sugar.
【知识点】 健康饮食 说明文

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【推荐1】Though you might think you were taking care of your health by eating enough fruit and vegetables every day, new research has come out suggesting that you might be swallowing microplastic particles(微塑科颗粒)along with all those vitamins, minerals, and fibre. A study published in the journal Environmental Research has found that fruits and vegetables absorb microplastic particles from the soil and move them through vegetal tissues, where they remain until eaten by hungry diners, thus getting transferred to human bodies.

The researchers, who are from the University of Catania in Italy, analyzed a variety of common fruits and vegetables--carrots, lettuce, broccoli, potatoes, apples, and pears. These were chosen for the fact that they are frequently consumed, usually one per day, which allowed the researchers to better assess the dietary intakes of MPs(microplastic particles)and NPs(nano-plastics). The samples were purchased from different sources in the city of Catania, including a small fruit vendor and a supermarket.

The researchers found that apples, followed by pears, were the most polluted fruit samples, and carrots were the most polluted vegetable. In the study’s discussion section, the authors wrote, “We can assume that the fruits contain more MPs not only because of the very high vascularization(血资化)of the fruit pulp(果肉)but also due to the greater size and complexity of the root system and age of the tree(several years)compared to the vegetables(60-75 days for the carrot).”

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It’s an area that will likely see a lot more attention in coming years, with the study authors calling for further research into the question of microplastic and whether it harms the health of both plants and humans.

1. What is the study about?
A.The main cause of soil pollution.
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C.The microplastic pollution in fruits and vegetables.
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C.It presented the danger of MPs to human’s body.
D.It showed the influences of MPs on plants.
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B.It wasted them quite a lot of time.
C.It needs to be further studied.
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