Write about genetic explanation of picky eaters托福听力原文翻译及问题答案

Write about genetic explanation of picky eaters托福听力原文翻译及问题答案

一、Write about genetic explanation of picky eaters托福听力原文：

NARRATOR:Listen to a conversation between a student and his biology professor.MALE STUDENT:Professor Landry?FEMALE PROFESSOR:Hi,Dennis.You are right on time.Come on in and have a seat.MALE STUDENT:Great!Thanks.FEMALE PROFESSOR:So like I told you in class,I just wanted to take a few minutes to meet with everyone to make sure your class presentations for next week are all in order and coming along well.And as you know,you are supposed to report on some area of recent research in genetics,something,you know...original.MALE STUDENT:Well,I think I found just the thing!It actually occurred to me a couple nights ago while I was eating dinner in the cafeteria...Tell me,Professor...do you like broccoli?FEMALE PROFESSOR:Broccoli?You mean,the vegetable broccoli?MALE STUDENT:Yeah.FEMALE PROFESSOR:Well...I guess not really...MALE STUDENT:Me neither.I have never liked it—or most other vegetables,for that matter:brussels sprouts,asparagus,cauliflower—you name it.They just taste bitter and...well,nasty to me.My mother always called me a picky eater.FEMALE PROFESSOR:O-kayyy...and?MALE STUDENT:And so I got to wondering:I mean,I am obviously not the only person like this.So is this just because of some,like trauma from our childhoods?Some bad experience we've had with vegetables?Or could there be some genetic explanation for why some people are picky eaters and others aren't?FEMALE PROFESSOR:OK.I see.Well,I suppose it's a possibility.MALE STUDENT:Actually,it turns out it's more than a possibility.I started doing some research in the library that night and I found out that a biologist at the National Institutes of Health has been looking at that very question recently.FEMALE PROFESSOR:Well,I guess that's not too surprising.And this is great stuff actually.So what's the verdict?MALE STUDENT:Well,this guy seems to have discovered a particular gene that actually makes it possible for people to taste the bitterness in certain green vegetables.But people who have a mutation in that gene cannot taste the bitterness.FEMALE PROFESSOR:Well,that's certainly fascinating!But...so this biologist is basically claiming that people who like to eat these vegetables actually have some sort of sensory deficit?Sort of makes us picky eaters than normal ones,doesn't it?I mean,that's kind of turning things on their head,isn't it?MALE STUDENT:Well,then again,it wouldn't be the first time,would it?Think of it this way:humans originally needed to have a stronger sensitivity to bitter-tasting foods so they could learn what plants were good for them and which ones might be poisonous.But at some point,as people figured out what they could safely eat,this need became less crucial and a segment of the population lost that ability.FEMALE PROFESSOR:OK.Well,you make a compelling case.I can't wait to hear more about this when you deliver your report.

二、Write about genetic explanation of picky eaters托福听力中文翻译：

旁白：听一个学生和他的生物学教授之间的对话。男学生：兰德里教授？女教授：嗨，丹尼斯。你准时了。请进，请坐。男学生：太好了！谢谢女教授：就像我在课堂上告诉你的，我只想花几分钟时间和大家见面，确保下周的课堂报告都井然有序，进展顺利。正如你所知道的，你应该报告一些遗传学的最新研究领域，一些，你知道的，原创的。男学生：嗯，我想我找到了！几天前我在自助餐厅吃晚餐的时候突然想到了…告诉我，教授…你喜欢西兰花吗？女教授：西兰花？你是说蔬菜花椰菜？男学生：是的。女教授：嗯……我想不是真的……男学生：我也是。我从来都不喜欢它，也不喜欢大多数其他蔬菜，比如球芽甘蓝、芦笋、花椰菜。它们尝起来很苦，对我来说很恶心。我妈妈总是叫我挑食。女教授：O-kayyy…和？男学生：所以我想知道：我的意思是，我显然不是唯一一个这样的人。所以这只是因为我们童年的创伤吗？我们在蔬菜方面有过一些不好的经历？或者，为什么有些人挑食，而有些人不挑食，可能有某种基因解释吗？女教授：好的，我明白了。嗯，我想这是可能的。男学生：事实上，这不仅仅是一种可能性。那天晚上我开始在图书馆做一些研究，我发现美国国立卫生研究院的一位生物学家最近一直在研究这个问题。女教授：嗯，我想这并不太令人惊讶。事实上，这是很棒的东西。那么判决是什么？男学生：嗯，这家伙似乎发现了一种特殊的基因，它使人们能够品尝某些绿色蔬菜中的苦味。但基因突变的人无法尝到苦味。女教授：嗯，那当然很迷人！但是…所以这位生物学家基本上是说喜欢吃这些蔬菜的人实际上有某种感觉缺陷？有点让我们比正常人更挑剔，不是吗？我的意思是，这有点让他们头晕目眩，不是吗？男学生：好吧，再说一遍，这不是第一次了，是吗？这样想：人类最初需要对苦味食物有更强的敏感性，这样他们才能知道哪些植物对他们有益，哪些植物可能有毒。但在某个时候，当人们发现他们可以安全地吃什么时，这种需求变得不那么重要，一部分人失去了这种能力。女教授：好吧，你提出了一个令人信服的理由。我迫不及待地想在你发表报告时听到更多关于这一点的消息。

三、Write about genetic explanation of picky eaters托福听力问题：

Q1:1.Why does the professor meet with the student?

A.To determine if the student has selected an appropriate topic for his class project

B.To find out if the student is interested in taking part in a genetics project

C.To discuss the student’s experiment on taste perception

D.To explain what the student should focus on for his class presentation

Q2:2.Why does the student ask the professor about broccoli?

A.To get her to describe some of its genetic features

B.To find out if she is familiar with recent research on vegetable DNA

C.To introduce an idea that he has had for a research topic

D.To help explain why he needs extra time to prepare his presentation

Q3:3.What possible causes does the student consider for not liking the taste of vegetables?[Click on 2 answers.]

A.A genetic predisposition

B.Cooking methods that fail to remove the vegetables’bitter taste

C.A bad childhood experience associated with eating vegetables

D.Not being served enough vegetables during childhood

Q4:4.According to the student,why was it advantageous for early humans to be sensitive to bitter tastes?

A.It helped them to identify vegetables as sources of vitamins.

B.It helped them to avoid eating foods that were not healthy for them.

C.It made them less likely to limit their diet to sweet and salty foods.

D.It allowed them to distinguish between ripe and unripe vegetables.

Q5:5.What does the student imply when he says this:

A.He has often disagreed with the professor in the past.

B.The biologist in question has a history of advocating nontraditional ideas.

C.Biologists’research methods are sometimes regarded as unusual by other scientists.

D.Scientific explanations are sometimes contrary to what people might expect.

四、Write about genetic explanation of picky eaters托福听力答案：

A1:正确答案：A

A2:正确答案：C

A3:正确答案：AC

A4:正确答案：BC

A5:正确答案：D