★★★

文章分析：

Blurb給出了文章的研究主題以及兩個(gè)相關(guān)理論。

para 1: 引出研究背景及研究人員，并點(diǎn)出研究目的（因?yàn)橛袑W(xué)生質(zhì)疑，所以設(shè)計(jì)研究項(xiàng)目觀察小鳥如何學(xué)飛）；

para 2: 研究實(shí)驗(yàn)的設(shè)置及調(diào)整（中發(fā)生的故事）；

Chukar Partridge?石雞

incredulous

para 3: 實(shí)驗(yàn)結(jié)果（小鳥“手腳”并用）；

para 4:?新的實(shí)驗(yàn)以及結(jié)果（鳥揮動(dòng)翅膀是為了增加抓地力）；

spoiler 車的尾翼

Formula One racing

尾翼的空氣動(dòng)力學(xué) aerodynamic

para 5: 給出定義，實(shí)驗(yàn)拓展及延伸（不僅小鳥如此，成鳥也一樣）；

para 6: 最終結(jié)論，WAIR彌補(bǔ)了blurb中提到的兩種理論的不足。

line 70?with one fell swoop

If you do something?in one fell swoop?that means you did it in a single action. This phrase can also mean that something was done quickly; a swift action.

Example:?My yard was a mess. The grass was overgrown and weeds were popping up everywhere! To solve the problem, I brought out my nifty lawnmower and?in one fell swoop?I restored my lawn back to a presentable condition.

題型解析：

21 D 結(jié)構(gòu)題的篇章結(jié)構(gòu)

22 A 單詞意思題

dare?

dispute:?argue about sth.?;?discuss?heatedly; compete?for

23 A?間接細(xì)節(jié)（假設(shè)題）

這一題值得一說。

assumption就是實(shí)驗(yàn)設(shè)置的大前提，前提成立，這個(gè)實(shí)驗(yàn)才有做的可能。

那對(duì)于做題，我們可以用“取反選項(xiàng)，實(shí)驗(yàn)就變得沒有意義”來確定正確答案。

而錯(cuò)誤答案即使取反，對(duì)于實(shí)驗(yàn)也沒啥大的影響。

這是這一題的解題思路，到GRE層面還是會(huì)考的。

不過這一題錯(cuò)，還有一層是A里的表達(dá)不認(rèn)識(shí)：

shed light on ... 闡明，解釋清楚

這一題雖然難，但是可以用排除法及下一題循證來輔助解決。

24 B 上一題的定位

大前提肯定就出現(xiàn)在實(shí)驗(yàn)原理、背景的地方了。也就是para 2的位置。

25 C?結(jié)構(gòu)題之信息目的

26 C?直接細(xì)節(jié)

27 B?直接細(xì)節(jié)

28 B 單詞意思題

29 D?間接細(xì)節(jié)

30 D?上一題定位

作者簡(jiǎn)介：

Thor Hanson -?Author & Biologist

Dr. Thor Hanson is a Guggenheim Fellow, a Switzer Environmental Fellow, and an award winning author and biologist.??His books include?Buzz,?The Triumph of Seeds,?The Impenetrable Forest,?Feathers,?and the illustrated children's favorite,?Bartholomew Quill. ?Hanson's writing has been translated into more than ten languages?and has?earned many accolades, including The John Burroughs Medal, the Phi Beta Kappa Award, the AAAS/Subaru SB&F?Prize, and three?Pacific Northwest Book Awards.?He co-hosted the PBS?Nature?series?American Spring Live, and he has appeared as a guest on many other programs, including??NPR's?Fresh Air, Science Friday, To the Best of Our Knowledge, and?On Point, as well as?The Current?on?CBC, and?Book Lust?with Nancy Pearl.? Hanson lives with his wife and son on an island in the Pacific Northwest.?

For more info:?

https://www.thorhanson.net/