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We’ve all been there, running for a ls o...

    We’ve all been there, running for a ls or train on a cold morning only to find that our nose is also running! Grab some tissues and learn the science behind the phenomenon known as “skier’s nose.”

A nose like a running tap in winter is business as usual for many people. People call it “skier’s nose". In a study, researchers found that 96 percent of people surveyed reported experiencing some degree of the condition.

Apparently, getting a runny nose in cold weather is a bodily defense reaction. That' s because the nose has two main purposes: 1) to filter bacteria so they don’t reach our lungs, and 2)to warm and humidify(加湿) the air before it reaches our lungs. Our airways are lined with tiny hairs known as cilia In the nose, these cilia wave back and forth to remove our mucus (黏液)so that bacteria can be blocked out. In cold weather the cilia are slowed. When cilia slow, bacteria remain in place and multiply, and this is why people get sick in winter. Not that the nose isn't trying to keep you healthy. All that running nose experience is the nose working overtime to produce more liquid to help move bacteria along. To help it out, experts say that you can try physically warming your nose: Rub your hands together, and then breathe into cupped hands or draw in steam from hot green tea and drink it, as green tea helps accelerate the growth and functioning of cilia.

Our nose runs in winter for one more purpose, which is to fight against the drier outside (and inside) air. In winter, or when it’s cold outside, the air is much drier than in summer. Our noses respond by producing more liquid to help humidify the air to a level our bodies need, and that’s when it starts to run out of the end of our nose.

1.What does the underlined word “filter” probably mean in the third paragraph?

A.Kill. B.Prevent.

C.Defend. D.Trap.

2.What can we know about “cilia”?

A.They only exist in the nose. B.They stop working in winter.

C.They can sweep away mucus. D.They help break down bacteria.

3.Which of the following is the best title for the text?

A.When Do You Have A Running Nose?

B.What Are the Purposes of Your nose?

C.How Can You Deal With “skier’s nose”

D.Why Does, Your Nose Run When It's Cold?

 

1.B 2.C 3.D 【解析】 这是一篇说明文。文章讲述了skier’s nose现象背后的科学。讲述了冬天流鼻涕的原因以及它如何保护我们的身体。 1.词义猜测题。根据同句中的so they don’t reach our lungs(它们进不了我们的肺部)可知,前句是原因。表示鼻子的功能就是“阻止”细菌进入我们的肺部。故选B项。 2.细节理解题。根据第3段In the nose, these cilia wave back and forth to remove our mucus (黏液)so that bacteria can be blocked out可知,鼻子的这些纤毛来回清除粘液这样可以阻隔细菌。故选C项。 3.主旨大意题。分析上下文后知道,文章一开始引用生活中的实例告诉我们:鼻子在冬天的时候会流鼻涕。接着文章分析了流鼻涕的原因和流鼻涕在保护身体上的作用。故选D。
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