Question

    It's a terrible feeling. You feel sick,tired,and the room won’t stop spinning. Whafs wrong with you? Perhaps you are experiencing motion sickness. Motion sickness,also called travel sickness,is a common experience. Depending on how you travel,it can be named carsickness or seasickness. You may get the feeling when you try to read a book in a car or on a boat. Even astronauts train hard to fight motion sickness before going into space.

   But why do we get motion sickness? And how can we prevent it?

We have four functions which sense movement. Our eyes see if we are moving. The ears contain special liquid to sense direction,while our skin knows what part of the body is touching the ground. Our muscles react to movement,like when you stop yourself swaying (摇摆) when the car sharply turns. When these four functions get puzzled,they start sending mixed messages to our brain,and we develop motion sickness.

   Just think： when we’re in a moving car and reading a book. Our eyes see we are moving when we look out of the window,but still (静止的) when we read. The ears hear the car moving,yet the skin says we are sitting dowh. Muscles may only feel movement if the car turns. So our senses are all out of balance,and we start to feel ill.

But here's some good news to fight motion sickness. Choose an aisle (过道) seat on a plane,train and sit in the front of a car. Avoid standing. Always face the same way you’re traveling and leave your books at home.

    Why don't some people get motion sickness? Scientists are still working on it,but they think genes may play a part.

46. When you have travel sickness,you may feel .

   A. lonely   B. excited   C. moved   D. tired

47. We get motion sickness when .

   A. our brain gets mixed messages

   B. our ears fail to sense direction

   C. our skin touches the ground

   D. the car moves too fast

48. To fight motion sickness on a moving train,you’d better

.

    A.often stand up to look out

   B. face the opposite way of traveling

   C. take an aisle seat

   D. read a took to help you relax

49. From the passage,we can infer that .

   A. astronatats don't get motion sickness before going into space

   B. with the balance of the senses,we can overcome carsickness

   C. you may get carsickness when you read books in a parked car

   D. scientists haven’t found why people get motion sickness

Answer 1

[阅读B篇短文大意]文章主要讲述了晕动病的相关情况 并提出了避免晕动病的一些措施。

46. D通读第一段可知选D.

47. A 由第三段最后一句M When these four functions get puzzled, they start sending mixed messages to our brain,and we develop motion sickness"可知选 A.

48. C通读第五段可知，为了防止在运动的火车上得晕动病，最好坐靠过道的座位。

49. B由第四段最后一句”So our senses are all out of balance,and we start to feeill”可知，当我们感觉失衡时，我们就会得晕 动病。由此可以判断，如果我们感觉平衡的话，我们就不 会得晕动病。