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英语四六级考试
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英语六级标准听力测试模拟二Section B答案解析

  Section B

  Passage One

  Take care of your teeth and your teeth will take care of you. Your teeth are a living part of your body. They have nerves and blood vessels. Diseased teeth can cause pain, die, and fall out. False teeth often do not work as well as natural teeth. If you do take proper care of your teeth, you can keep them your entire life.

  Plaque is the main enemy of healthy teeth. Everyone has plaque. It is a sticky, colorless film that coats the teeth. Plaque is always forming on the teeth. Plaque that is left on the teeth for some time hardens. The result is tooth decay and gum disease. The bacteria in plaque live on sugar. They change sugar into acids. If left untreated, decay goes deeper and deeper into the tooth. After a while the decay reaches the nerves and blood vessels of the inner tooth. By the time this happens, the tooth has probably started to ache.

  In addition to tooth decay, there are also gum diseases to watch out for. The bacteria in plaque make poisons that attack the gums. Teeth become loose and may fall out. Adults lose most teeth this way.

  Gum disease starts slowly. There may be no pain. As a rule, gum disease first appears as swelling. Then the gums become tender. There also may be bleeding. To heal diseased gums, your teeth need one or more dental cleanings. Regular visits to your dentist are a must.

  Many people worry about bad teeth. This may result from several causes. It could be due to gum disease or leftover bits of food. It may be caused by plaque. Decayed teeth can cause bad breath.

  Keep your mouth healthy! When you brush your teeth, do a good job.

  Questions 26 to 28 are based on the passage you have just heard.

  26. What does tooth contain according to the passage?

  【解析】选[A]。根据文中的Your teeth are a living part of your body. They have nerves and blood vessels可知,牙齿存在神经和血管,由此可知选项[A]正确。

  27. What does the bacteria in plaque live on?

  【解析】选[C]。文中提到The bacteria in plaque live on sugar,由此可知,牙菌斑里的细菌依靠糖分生存,因此选项[C]正确。

  28. What is the most appropriate title for this article?

  【解析】选[B]。本文通过介绍牙齿的构成部分以及牙菌斑引发的蛀牙和牙龈疾病,指出保持牙齿健康的必要性,因此适合本文的标题应为:蛀牙和牙龈疾病,[B]项正确。

  Passage Two

  Good morning. First I’d like to welcome all of you to this workshop on student housing. I’ll go through the information about types of housing available for the fall and later hand out application forms. Then, if you have any questions, feel free to ask me.

  There are three main types of housing here for you to choose from: the dorms, the family student apartments, and the international houses. As of now, there is some space available in each type, but they are filling up fast. You should get your application in as soon as possible. Let me explain some of the main features for each type of housing.

  We have men’s dorms, women’s dorms, and coed dorms. Most of the rooms are doubles, with two beds, two closets, and two desks. We also have a few triples and a few single suites, but I think the suites are already taken. On each floor of the dorms there is a large bathroom and shower area. There aren’t cooking facilities in the dorms, but you can buy a meal ticket for the cafeteria.

  The family student apartments are grouped together near the north entrance to the school. Each apartment has a kitchen, a living dining area, and either one or two bedrooms. There is a fenced play area for children.

  The international houses are a group of apartments for any student. They are organized into language and culture themes, and some of them have rules about speaking only a certain language during mealtimes. It’s been a good way for students to learn about other cultures as well as practice languages. These houses are for all students, no matter how much of a particular language you speak. I think that Spanish House is full, but there are rooms available in all the other houses.

  Well, that’s the main information. I’ll pass out these applications now and answer your individual questions.

  Questions 29 to 32 are based on the passage you have just heard.

  29. According to the speaker, what should the listeners do as soon as possible?

  【解析】选[B]。文中的...but they are filling up fast. You should get your application in as soon as possible表明,因为房间很快就会住满人了,所以listeners需要尽快把申请交上去,[B]项正确。

  30. Which type of housing allows cooking?

  【解析】选[C]。由文中的The family student apartments...Each apartment has a kitchen可知,供一家人住的房间里设有厨房,可以做饭,[C]项正确。

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