Question

Your nose has many important jobs, and is always busy.

Smelling

Smelling helps you gather information about the world around you. A good scent (气体),like flowers, brings you pleasure. A bad scent, like smoke or sour milk, warns you of danger. Most things around you release scent particles (微粒) into the air. These invisible chemicals enter the nose when you breathe. Nerves in the nose send information to the brain to identify a smell. You are able to recognize thousands of smells.

Breathing

    Most of the air you breathe enters through your nose. The nose uses hair and mucus (粘液) to clean dust and germs (细菌) out of the air. The air that enters your nose contains oxygen. Your body uses oxygen to unlock the energy in the food you eat.  Even when you sleep, your body needs energy to keep your heart beating and your brain working.

Tasting

    Your nose helps you enjoy food. Flavor is a mixture of taste and smell. The smell of the food helps you identify what you are eating. The sense of smell contributes more to (贡献) food flavor than the sense of taste .When you are sick and have a stuffy nose, your food doesn’t taste as good because without smell, food loses most of its flavor.

Smell memory

    Smells can bring back memories. Your brain uses a process to create a picture in your mind from the odors(气味)you smell. Smells can affect your feelings because the part of the brain that helps you identify smells is close to the area that affects your emotions, mood and memory. More smell memories are collected as you get older.

    Your nose has many important jobs, and is more than just a smeller!

1.How many important jobs does a nose do according to the passage?

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2.Smelling helps you recognize thousands of smells, doesn’t it?

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3.What does the nose use to clean dust and germs out of air?

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4.What happens to your food if you are sick and have a stuffy nose?

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5.How do smells bring back memories?

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Answer

1.Four. They are smelling, breathing, tasting and smell memory.

2.Yes, it does.

3.Hair and mucus.

4.It won’t taste as good.

5.By using a process to create a picture in your mind from the odors you smell.

【解析】本文是一篇科普类短文。讲述的是“鼻子”重要而忙碌的工作：闻气味、呼吸、品尝及气味记忆等等。

1.细节理解题。题意：根据短文，鼻子有多少项重要的工作？根据每段的小标题可知，鼻子主要有四项工作：闻气味、呼吸、品尝及气味记忆。故回答：Four. They are smelling, breathing, tasting and smell memory.

2.细节理解题。题意：闻味道帮助你认识成千上万的味道，是不是？从第二段的Nerves in the nose send information to the brain to identify a smell. You are able to recognize thousands of smells.可知鼻子里的神经给大脑发送信息来识别一种气味，然后人们就能够认识成千上万的气味。故作肯定回答：Yes, it does.

3.细节理解题。题意：鼻子用什么来清扫灰尘和细菌？从第三段的The nose uses hair and mucus (粘液) to clean dust and germs (细菌) out of the air.可知，鼻子用鼻毛和粘液来清扫。故回答：Hair and mucus.

4.细节理解题。题意：如果你生病了或是鼻子不通，你的食物会发生什么？从第四段的when you are sick and have a stuffy nose, your food doesn’t taste as good because without smell, food loses most of its flavor.可知生病或鼻子不通时，食物口感不好。故回答：It won’t taste as good.

5.细节理解题。题意：气味怎样唤起记忆？由第五段的Your brain uses a process to create a picture in your mind from the odors(气味)you smell.可知大脑通过在头脑中创建一幅来自闻到的气味的图的方式来存储气味，并唤起记忆。故回答：By using a process to create a picture in your mind from the odors you smell.