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托福听力特训每天一题test19下载
时间:2014-03-26 16:49来源:未知 责任编辑:yutao 点击:

  托福听力特训题目,每天一练!如果大家学习或工作很忙,就每天认真练习听一题,听透看透。下面是关于托福听力特训test 19的听力资料,希望大家认真练习完再看听力文本哦!希望各位考生在多听中能得到锻炼!

 

  托福听力特训test 19资料 点击下载>>>


 

  附托福听力特训test 19听力题目及听力文本:

 

  Biology: Sunshine

  1. What is the main idea of the lecture?

  A The lack of Vitamin D is the main cause of skin cancer.

  B Sunbathing for a long time causes no problems.

  C The danger of the sunshine has been ignored because of its benefits.

  D The advantages and disadvantages of the sun .

  2. According to the lecture, when concerned with our bodies, what is the main function of sunshine?

  A It changes ergosterol to Vitamin D.

  B It suppresses serotonin.

  C It can cause Seasonal Affective Disorder.

  D It can cause skin and bladder cancer.
 

  答案:(D)、(A)

  Biology: Sunshine

  “Good morning class. Today I thought we would talk about something bright and cheerful: the sun. I know most of you got to school before the sun came up, but can anyone tell me how they feel when its sunny compared to when it’s cloudy?”

  (Another voice)

  “I find it’s a lot easier to get up in the morning if it’s sunny”

  (Back to narrator)

  “Good. How do you usually feel if it’s cloudy?”

  (Another voice)

  “Well I don’t mind, because I enjoy staying in on a rainy day curled up in bed with a good book.”

  (Back to narrator)

  “Well, what if I told you it would rain for weeks on end with no break?”

  (Another voice)

  “Ya I can see your point. I don’t think I would like that very much”

  (Back to narrator)

  “Most of the articles we read lately regarding the sun are discussing the negative effects of staying in the sun for too long saying that ultra violet radiation from the sun is a major cause of skin cancer. Although these articles are factual, the sun does have some positive side effects as well. As a matter of fact some scientists believe that sunlight may reduce the risk of several types of cancer. “

  (Another voice)

  “Excuse me but many articles I’ve read blame the sun for causing cancer, stating that it can take as little as 30min to get a sunburn”

  (Back to narrator)

  “Yes and those articles are correct. However in small doses the sun can be quite healthy for you. In fact recent studies have found that sunlight can actually help protect you from certain types of cancer such as breast colon bladder and stomach.More importantly the sun provides us with our main source of vitamin D.”

  (Another voice)

  “Well I don’t need to worry about vitamins because I take multi vitamins everyday”

  (Back to narrator)

  “That’s great, but wouldn’t it be better if you didn’t have to take them and you were able to get vitamins in a more natural way such as food and the sun? Most people understand that nutrients strengthen our bones and muscles and heighten our immune system to better fight diseases like the common cold. However, many people don’t realize that the ultra violet or UV rays from the sun actually convert irgasterol which is found in our skin to vitamin D. Vitamin D is needed for normal growth of teeth and bones and has also been proven to prevent the development and increase of cancerous tumors”

  (Another voice)

  “Does that mean we should spend all the day in the sun without any protection?

  (Back to narrator)

  “No spending roughly 10min per day in the sun should be enough to supply us with all the Vitamin D that we need.”

  (Another voice)

  “What happens if we don’t get enough Vitamin D?”

  (Back to narrator)

  “Excellent question! I’m glad you asked me that. Low Vitamin D can cause many diseases such as chronic fatigue, a softening of the bones, osteoporosis and multiple skilerriosis. Getting back to our mood some researchers have proven that sunshine can actually cheer you up. When I see the sun I always feel happy energetic and generally positive. But did you realize that the sun can change your mood chemically and might even prevent depression. There is a saying called ‘spring fever’ when many people feel the beginning of spring as a sign of good days ahead. During the winter many of us are stuck indoors out of the sun. The lack of sun causes for many people a condition called SAD or Seasonal Affective Disorder. SAD is caused by suppression of serotonin which keeps our mood, emotions, sleep and appetite in check. When we don’t get enough we feel depressed and this is usually experienced by people who are deprived of sunlight during the dull winter months. So class during your break why don’t you step outside and get a bit of Vitamin D?”

  以上就是嘉卓小编为大家分享的关于托福听力特训资料下载,希望对大家有所帮助!最后预祝大家托福考试中取得佳绩!
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