Question

6．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，warns you of danger．Most things around you give off scent particles （微粒） into the air．They enter the nose when you breathe．Nerves（神经） in the nose send information to the brain to know what smell it is．You are able to tell thousands of smells．
Breathing
Most of the air you breathe enters through your nose．When you breathe，much oxygen（氧气）in the air that enters your nose．Your body uses oxygen to unlock the energy（能量） 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（味道） is a mixture of taste and smell．The smell of the food helps you know what you are eating．When you are sick and have a running nose，your food doesn't taste as good as before because without smell，food loses most of its flavor．
Smell memory（回忆）
Smells can bring back memories．Your brain uses a way to create a picture in your mind from the odors（气味）you smell．More smell memories are collected as you get older．
Your nose has many important jobs，and is more than just a smeller!

46．How many important jobs does a nose do according to the passage？What are they？Four．They are smelling、breathing、tasting and semll memory．
47．Smelling helps you learn about the world around you，doesn't it？Yes．
48．What happens to your food if you are sick and have a running nose？It doesn't taste as good as before and loses most of its flavor．
49．How do smells bring back memories？Our brain uses a way to create a picture in our mind from the odors our smell．
50．What do you think of your nose？It has many important jobs，and is always busy．．

Answer 1

分析 你的鼻子有很多重要的工作，总是很忙．
嗅觉
嗅觉能帮助你收集关于你周围世界的信息．一个很好的气味，像花会给你带来快乐．一个坏的气味，像烟雾，会给你一个危险警告的信息．你周围的大多数东西向空气中释放气味微粒．当你呼吸时这些气味微粒进入鼻子．鼻子中的神经向大脑发送信息，以便知道它是什么气味．你能够分辨出成千上万的气味．
呼吸
你呼吸的大部分空气通过你的鼻子进入．当你呼吸时，空气中的氧气进入你的鼻子．你的身体使用氧气解开你吃的食物中的能量．即使你睡觉，你的身体也需要能量来维持你的心跳和你的大脑工作．
品尝
你的鼻子帮助你享受美食．味道是味道和气味的混合体．食物的气味帮助你知道你在吃什么．当你生病了流鼻涕，你的食物没有之前的味道好是因为没有气味，食物失去其大部分的味道．
气味记忆
气味可以带回记忆．当你的鼻子嗅到一种气味的时候，你的大脑会使用一种方法来创建一个画面．随着你变老，你会收集更多的气味记忆．
你的鼻子有很多重要的工作，不仅仅是一个鼻子！

解答 46．Four．They are smelling、breathing、tasting and semll memory．细节理解题．文中分别介绍了鼻子的各种功能，从段落之前的中心词可以看出，鼻子的功能在这篇文章中介绍了4个，即文章中的小标题：smelling、breathing、tasting and semll memory．
47．Yes．细节理解题．根据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，warns you of danger．可知，鼻子的嗅觉可以帮助我们理解我们周边的信息，例如嗅到花香时我们会觉得心情舒畅，问道烟雾时，会给我们一个危险的警告，因此我们的鼻子可以帮助我们了解周边的环境（世界）．故答案是肯定的．
48．It doesn't taste as good as before and loses most of its flavor．细节理解题．根据When you are sick and have a running nose，your food doesn't taste as good as before because without smell，food loses most of its flavor．可知，当你生病了流鼻涕，你的食物没有之前的味道好是因为没有气味，食物失去其大部分的味道．因此答案为It doesn't taste as good as before and loses most of its flavor．
49．Our brain uses a way to create a picture in our mind from the odors our smell．细节理解题．根据Your brain uses a way to create a picture in your mind from the odors（气味）you smell．More smell memories are collected as you get older．可知，当你的鼻子嗅到一种气味的时候，你的大脑会使用一种方法来创建一个画面．因此，之所以你能够闻到一种气味之后会引起回忆，是因为我们在闻到气味的时候，大脑会创建一个画面．
50．It has many important jobs，and is always busy．文章主旨题．根据全文的内容，首先框定了一个主题，就是关于我们的鼻子，我们的鼻子具有很多功能，即Your nose has many important jobs，and is always busy．随后分条论述了鼻子的四个功能，因此本文的主旨就是在说鼻子的功能很多，很重要，因此阅读本文后，你对鼻子的看法，应该是鼻子的功能很重要，即It has many important jobs，and is always busy．

点评 本文是一篇科普类文章．讲述的是鼻子的功能及重要性，做题时要在理解好文意的基础上，与题目有机的结合，从文章中找到相关细节性的句子与选项细细比对，进行选择或推理判断，选出符合文章内容的正确选项．做题注意灵活，有时可采用排除法或直选法确定出最终答案．