托福tpo51聽力conversation1 Biology Experiment Reproduction

托福tpo51聽力conversation1 Biology Experiment Reproduction，那么接下來就跟著中國教育在線的小編詳細了解一下吧。

Biology Experiment Reproduction托福聽力原文翻譯及問題答案

一、Biology Experiment Reproduction托福聽力原文：

NARRATOR:Listen to part of a conversation between a student and her biology professor.MALE PROFESSOR:So the assignment is to reproduce one of the animal camouflage experiments we read about in our text book.Which experiment did you pick?

FEMALE STUDENT:Well...I was wondering if I could try to reproduce an experiment that's kinda the opposite of what was discussed in the textbook?MALE PROFESSOR:So,instead of how and why an animal might hide itself,you want to do something about why an animal might want to be seen?Hmmm.Tell me more.

FEMALE STUDENT:Well,I got the idea from one of the journals you said we should look at…it's an experiment about,um,they called them eyespots in the article?

MALE PROFESSOR:Eyespots,sure,the patterns on the wings of moths and butterflies that are generally believed to scare off predators because they look like big eyes.

FEMALE STUDENT:Yeah,except the article was about an experiment that disputes that theory.MALE PROFESSOR:Well,we know that the markings do scare the birds,but the idea that the spots look like eyes is,well that's just a commonly held belief.FEMALE STUDENT:So—that's not even based on research?

MALE PROFESSOR:Well,this whole idea of moth or butterfly markings being scary because they look like eyes rests on how we imagine that their predators—like birds—perceive the markings.And we can never really know that.All we can do is observe bird behavior.But tell me more about the experiment.FEMALE STUDENT:OK,so the experiment looked at the shapes of the markings on moth wings.The researchers wanted to know if the markings that were round or eye-shaped were more effective at deterring predators than square or rectangular markings.MALE PROFESSOR:OK…

FEMALE STUDENT:Yeah.So,they attached food to paper models of moths,with different shaped marks drawn on the wings,to see how birds reacted.And what's interesting is,they realized that the round marks were not more effective at scaring birds than other shapes.MALE PROFESSOR:Were they less effective?

FEMALE STUDENT:No,they were about the same...but what researchers did determine is that larger markings are more effective than smaller markings at scaring off prey.They called this phenomenon“visual loudness.”

MALE PROFESSOR:Visual loudness,huh.Well,I guess it's not all that shocking,if you think about it.FEMALE STUDENT:So,anyway,is it OK?Can I repeat this experiment and write about it?MALE PROFESSOR:Yes,I think that'll work.The problem I foresee is,well,where?This is an urban campus...You'll have a hard time finding a good place to set up the experiment.

FEMALE STUDENT:Oh,I-I wasn't planning on doing it on campus.I'm going home for spring break,and my family lives in the country,far from the nearest city.I can set it up in the backyard.

MALE PROFESSOR:Good idea.Except one week is not a lot of time.So you'll need to make some adjustments to have enough data.I'd set up the experiment near a bird feeder,and get in as much observation time as you can.

二、Biology Experiment Reproduction托福聽力中文翻譯：

旁白：聽一個學生和她的生物教授之間的對話。梅爾教授：所以，任務(wù)是重現(xiàn)我們在課本中讀到的一個動物偽裝實驗。你選了哪個實驗？

女學生：嗯……我想知道我是否可以嘗試復(fù)制一個實驗，這個實驗與教科書中討論的有點相反？男教授：所以，你想做一些事情來解釋為什么動物會想被人看到，而不是動物會如何以及為什么會隱藏自己？嗯。告訴我更多。

女學生：嗯，我是從你說我們應(yīng)該看的一本雜志上得到這個想法的……這是一個關(guān)于，嗯，他們在文章中稱之為眼斑的實驗？

男教授：當然，眼點是飛蛾和蝴蝶翅膀上的圖案，因為它們看起來像大眼睛，所以通常被認為能嚇跑捕食者。

女學生：是的，但這篇文章是關(guān)于一個實驗的，這個實驗對這個理論提出了質(zhì)疑。男教授：我們知道斑紋確實會嚇到鳥類，但斑點看起來像眼睛的想法，這只是一個普遍持有的信念。女學生：所以這甚至不是基于研究？

男教授：好吧，蛾子或蝴蝶的斑紋之所以令人恐懼，是因為它們看起來像眼睛，取決于我們?nèi)绾蜗胂笏鼈兊氖橙鈩游铮ㄈ瑛B類）感知這些斑紋。我們永遠不會真正知道這一點。我們所能做的就是觀察鳥類的行為。女學生：好的，所以這個實驗觀察了蛾翅膀上的斑紋形狀。研究人員想知道圓形或眼睛形狀的標記是否比方形或矩形標記更有效地阻止捕食者…

女學生：是的。因此，他們將食物附在紙上的蛾子模型上，在翅膀上畫上不同形狀的標記，以觀察鳥類的反應(yīng)。有趣的是，他們意識到圓形標記在嚇唬鳥類方面并不比其他形狀更有效？

女學生：不，它們大致相同……但研究人員確定，較大的標記比較小的標記更能有效地嚇跑獵物。他們稱這種現(xiàn)象為“視覺響度”

男教授：視覺響度，嗯。好吧，如果你仔細想想，我想這并沒有那么令人震驚。女學生：那么，無論如何，這可以嗎？我可以重復(fù)這個實驗并寫下來嗎？男教授：是的，我想這會管用。我預(yù)見到的問題是，好吧，在哪里？這是一個城市校園……你很難找到一個好地方來設(shè)置實驗。

女學生：哦，我不打算在校園里做。我要回家度春假，我家住在鄉(xiāng)下，離最近的城市很遠。我可以把它放在后院。

男教授：好主意。除了一周的時間不多。因此，您需要進行一些調(diào)整以獲得足夠的數(shù)據(jù)。我在喂食器附近設(shè)置了實驗，并盡可能多地投入觀察時間。

三、Biology Experiment Reproduction托福聽力問題：

1.Why does the student talk with the professor?

A.She wants permission to revise an experiment that she conducted earlier.

B.She has a question about the findings of an experiment in the textbook.

C.She wants to reproduce an experiment that is not in the textbook.

D.She would like some advice about how to study butterfly and moth behavior.

2.What does the professor say is a common assumption about certain markings on butterfly and moth wings?

A.That the markings are usually hidden from view

B.That the markings attract some kinds of birds more than others

C.That some birds perceive the markings as large eyes

D.That butterflies and moths use the markings to attract mates

3.What were the results of the experiment that the student describes?[Click on 2 answers.]

A.Birds reacted to round markings the same way they reacted to square markings.

B.Large markings scared birds more than small markings did.

C.Most birds ignored markings that looked like eyes.

D.Birds were attracted to more colorful markings.

4.Why does the professor mention a bird feeder?

A.To suggest a strategy that may help the student carry out her task successfully

B.To recommend a place on campus that is suitable for the student's project

C.To discuss another experiment that has yielded surprising results

D.To point out a problem in the design of the original experiment

5.What can be inferred about the student when she says this:

A.She is skeptical about what the professor just told her.

B.She just realized that she designed her experiment incorrectly.

C.She is worried that she misunderstood something that she read.

D.She had assumed that there was scientific evidence for the theory.

四、Biology Experiment Reproduction托福聽力答案：

A1:正確答案：C

A2:正確答案：C

A3:正確答案：AB

A4:正確答案：A

A5:正確答案：D

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