[越毒]陆月叁起越毒（共59只，6/28-22:07更新）

lindasmile

伽利略水泵那篇，我觉得应该就是说发现大气压的过程，不知道是不是：
罗马时代以来，人们就注意到一个现象：用来输送水的虹吸管，当它们跨越高度在10米以上的山坡时，水就输不上去了。在超过l0米深的井里，抽水泵就不起作用了。人们早就知道只要把水管里的空气抽走，造成一个真空，那么水就会沿着水管往上流。他们无法解释水为什么会往上流，而不是通常那样“水往低处流”，就借用古希腊学者亚里士多德的名言"大自然讨厌真空"来解释。粗一想也对，大自然是不让真空存在的，一旦真空出现就让水来填补，于是水就被抽上来了。真空出现到哪里，水就跟到哪里。可是，为什么水到了10米高的地方就再也上不去了呢?尽管ll米、l2米处也存在真空。对此，伽利略只能解释说是大自然的那种"厌恶"是有限度的，到了10米以上的真空，它就不厌恶了，因而水就再也抽不上去了。"智者千虑也有一失"，伽利略对抽水问题的解释过于牵强附会，使他没有触及问题的实质。 伽利略的学生托里拆利把老师的思想推进了一大步。他认为，既然空气有重力就会产生压力，就像水有重力会产生压力和浮力一样。正是空气的压力把水从管子里往上压，压到10米的高度时，水柱的重力正好等于空气的压力，水再也压不上去了。为了证实这一点，托里拆利设计了一个实验，并让自己的助手维维安尼帮助去做。 要用10米高的水柱做实验是很不方便的，因为它有三、四层楼那么高，怎样观测呢?托里拆利聪明地利用比水重13.6倍的水银来作试验。他叫人制作了一根1米长的玻璃管，一端封闭，一端开口。维维安尼将水银灌满管子，然后用手指堵住开口的一端，将管子颠倒过来使开口的一端朝下，再放进一个盛满水银的陶瓷槽里。当他放开按住管口的手指时．管里的水银很快下降，当水银降到距槽里的水银面76厘米高度时，就不再降低了。换算一下就可以得出，76厘米高的水银柱产生的压强，正好等于10米水柱产生的压强。这个实验形象地显示出，水银槽里水银表面所受到的大气压强，刚好等于76厘米高的水银柱所产生的压强。托里拆利设计的这个实验装置，成了世界上第一个测量大气压强的气压计。后来，气象报告中的气压单位也曾沿用多少厘米(或毫米)水银柱高来表示。

guaidudu

楼主把这篇加上吧，原题一模一样的。

Two opposing scenarios,

the “arboreal” hypothesis and


the “cursorial” hypothesis, have


Line traditionally been put forward con-


(5)  cerning the origins of bird flight.


The “arboreal” hypothesis holds


that bird ancestors began to fly


by climbing frees and gliding


down from branches with the


(10) help of incipient feathers: the


height of trees provides a good


starting place for launching flight,


especially through gliding. As


feathers became larger over time,


(15) flapping flight evolved and birds


finally became fully air-borne.


This hypothesis makes intuitive


Sense, but certain aspects are


Troubling. Archaeopteryx (the


(20) earliest known bird) and its


maniraptoran dinosaur cousins


have no obviously arboreal


adaptations, such as feet fully


adapted for perching. Perhaps


(25) some of them could climb trees,


but no convincing analysis has


demonstrated how Archaeopteryx


would have both climbed and


flown with its forelimbs, and there


(30) were no plants taller than a few


meters in the environments where


Archaeopteryx fossils have been


found. Even if the animals could


climb trees, this ability is not


(35) synonymous with gliding ability.


(Many small animals, and even


some goats and kangaroos,


are capable of climbing trees


but are not gliders.) Besides,


(40) Archaeopteryx shows no obvi-


ous features of gliders, such as


a broad membrane connecting


forelimbs and hind limbs.


 The “cursorial”(running)


(45) hypothesis holds that small


dinosaurs ran along the ground


and stretched out their arms for


balance as they leaped into the


air after insect prey or, perhaps,


(50) to avoid predators. Even rudi-


mentary feathers on forelimbs


could have expanded the arm’s


surface area to enhance lift


slightly. Larger feathers could


(55) have increased lift incrementally,


until sustained flight was gradu-


ally achieved. Of course, a leap


into the air does not provide the


acceleration produced by drop-


(60) ping out of a tree; an animal


would have to run quite fast


to take off. Still, some small


terrestrial animals can achieve


high speeds. The cursorial


(65) hypothesis is strengthened by


the fact that the immediate the-


ropod dinosaur ancestors of


birds were terrestrial, and they


had the traits needed for high


(70) lift off speeds: they were small,


agile, lightly built, long-legged,


and good runners. And because


they were bipedal, their arms


were free to evolve flapping flight,


(75) which cannot be said for other


reptiles of their time.就是这篇原题的，一字不漏的，题目都一样！
给个链接大家参照一下。http://forum.chasedream.com/archiver/GMAT_RC/thread-225965-1.html

lzhch89

lz,我有个问题。讨论稿中关于女性的两篇GWD文章是这个月考过的原文吗？还是阅读材料呢？谢谢

可乐罐子

楼主人很好的，非常积极努力的为大家找JJ，为了不辜负楼主也要加油哈

cherry_rui

lz，真是好人。总结得超级仔细和认真，负责。自己考完了，还继续为人民服务。太感动了。祝你一生好运伴随！

Bale

oh yeah~~

abese

“咳咳，我要帮某bale辟谣， 叫bale美女的童鞋注意了~~~楼主是美女（这句话是bale逼我说的，悲催的楼主打赌输了，大家不要当真啊），bale不是~~bale是纯爷们噢~~”

无论如何，谢谢两位了！

pinkprincessJ

我能否弱弱的问一句，标题后面的V2 V4之类的是神马意思吖。求好心人解答。

Bale

我能否弱弱的问一句，标题后面的V2 V4之类的是神马意思吖。求好心人解答。

-- by 会员 pinkprincessJ (2011/6/21 14:02:43)

就是说每天更新了哪个篇目，每个Cder回忆的不同，用v几区分

pinkprincessJ

这样啊，谢谢~！！