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题型:阅读理解-单选 难度:0.65 引用次数:10 题号:19441865

Many people travel to different places in the world by air. Usually it takes a long time, perhaps half a day, for passengers to stay in the plane. So airlines offer passengers food. But it is common that they feel bad about the food taste. Do you agree? To solve this problem, airlines try hard to improve their food. They would like to do so because they don’t want to lose customers.

However, according to scientific research, part of the reason why plane food tastes bad is that at high altitude(海拔)we cannot taste things as well as we do on the ground.

Also scientists have found that our noses become very dry even before a plane takes off.

As the plane moves up, the change in air pressure reduces one third of the sensibility(感觉)of our taste buds(味蕾). So our taste buds become senseless. The sad fact, however, is that our noses don’t know it.

All of these help explain why food on the plane tastes so bad. They also help explain why airlines choose to offer passengers salty and spicy(辛辣的)food. Without doing so, the food would be tasteless.

Now there are many studies on this. According to one of them, some volunteers are asked to lie with their feet higher than their heads for weeks. And scientists write down their feelings about food taste.

Though scientists try their best, it is not as easy as they thought. Because they can’t deal with the special environment successfully, such as the change in air pressure, making food taste good is still hard for them.

1. In Paragraph 2,this problemrefers to ________ .
A.passengers stay long in the planeB.food on the plane tastes bad
C.passengers have no food to eatD.food on the plane is expensive
2. What do airlines do to solve this problem?
A.Get more customers.B.Offer more food.
C.Improve their food.D.Reduce the ticket price.
3. As the plane moves up, the change in air pressure reduces ________ of the sensibility of our taste buds.
A.1/2B.1/3C.1/4D.1/5
4. Why do scientists feel it hard to make food on the plane taste good?
A.The volunteers don’t know about food taste.B.The volunteers don’t understand them.
C.They can’t find enough volunteers.D.They can’t deal with the special environment successfully.
5. What is the best title of the passage?
A.Taste of Airplane FoodB.Airplane Travel
C.Scientific Research on NosesD.The Change in Air Pressure
【知识点】 科普知识 说明文

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Have you ever been to the Dead Sea, one of the most famous natural wonders in the world? Have you ever considered why it is called Dead Sea? Does it hold life? Can people swim there? With all these questions in your mind, let’s know something about it!

The Dead Sea is actually a lake in the Middle East. At four hundred meters below sea level, it’s the lowest point on the surface (表面) of the earth. It lies between the borders (边界), Israel, and the West Bank. It’s about 80 kilometers wide at its widest point (包围) by hot, dry desert (沙漠).

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1. Why does the writer use four questions in the beginning?
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