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[原始] 北美1月3号,归来机经

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发表于 2012-1-4 07:30:18 | 只看该作者 回帖奖励 |正序浏览 |阅读模式
600出头的分数。想想自己前前后后也就复习了半个多月,模考完连错题都没看,也可以接受了。
argument,人们在non-profit的情况下,有更高的motivation,更好的完成工作,建议公司大量的钱用于慈善,提高员工效率。
issue,Financial gain is the most important factor in career choosing。
数学,记住jj的一道,-203到200的和,-606。
5个整数,平均数为14,a<b<c<d<e,e是26,求最小的中间数,答案应该是8。

verbal 阅读1,CEO
阅读2,飞虫实验
阅读3,蝴蝶,通过研究一种毒素来确定蝴蝶的迁徙。
阅读4,关于tissue engineering,在in vivo怎么样,有一些问题无法解决,第二段科学家尝试通过in vitro来解决。
其他语文部分一片浆糊,实在不敢瞎回忆了,谢谢chase dream!
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14#
发表于 2012-1-8 20:02:35 | 只看该作者
dingLSS
13#
发表于 2012-1-8 12:41:28 | 只看该作者
顶,LS
12#
发表于 2012-1-8 10:52:20 | 只看该作者
想问下LZ,关于这篇蝴蝶的,跟这个内容是不是很像?

Brower has perfected a technique for tracking monarchs throughout the rest of the year, based on the butterflies' special relationship with milkweed plants. Monarchs lay their eggs on milkweed and, as larvae, eat the plants not only for nutrition but also for the toxins in the sap, which is poisonous to birds that prey on butterflies. The toxic compounds, known as cardiac glycosides, accumulate in larval tissues and persist after the larvae metamorphose into butterflies, making monarchs unpalatable to birds. "I've tasted the sap of the sandhill milkweed," says Brower, "and it's incredibly nauseating." Brower realized in the mid-1970s that he could use these poisons to understand monarch migration. The specific glycosides present in different species of milkweed vary from place to place, so analysis of a plant's glycosides can be used to determine its site of origin. Likewise, the glycosides in adult butterflies are a fingerprint of the plants on which the insects fed as larvae. "The light bulb went on," says Brower. His idea: If monarchs reflect the different arrays of glycosides in milkweeds, then he should be able to analyze butterfly glycosides and correlate individual insects with particular species of milkweed and with certain regions where the milkweed grew.
Traveling around the country, Brower trapped monarchs everywhere from the Great Lakes to Mexico and studied their glycosides. "We collected monarchs in the fall migration and established that over 90 percent fed on the northern milkweed pattern," he says. "Then we sampled the butterflies in Mexico and the ones along the Gulf Coast at the end of March and early April and, lo and behold, all of them had the same pattern. The same butterflies were going to Mexico and coming back in the spring."
Brower's work on glycosides helped to reveal the entire pattern of monarch migration. The first generation of monarch butterflies to return from Mexico stops along the Gulf Coast from Texas to Florida, where the insects lay eggs and die. The eggs hatch, and the new monarchs (with their distinctive southern milkweed fingerprint) head for the Great Lakes region. Later, the new generation of monarchs born around the Great Lakes flies to the East Coast, where they breed and die. Their offspring, fed on eastern milkweeds, then head south toward the Gulf Coast and on to Mexico, traveling as far as 90 miles per day and completing the great circle of monarch migration.
11#
发表于 2012-1-7 22:30:06 | 只看该作者
谢谢~~~
10#
发表于 2012-1-4 09:24:12 | 只看该作者
加油
9#
发表于 2012-1-4 09:21:03 | 只看该作者
俺明天北美1.4考 也是寒假假期准备了半个月
8#
发表于 2012-1-4 08:57:26 | 只看该作者
顶。。。期待狗狗。。。
7#
发表于 2012-1-4 08:56:43 | 只看该作者
一月三号溜狗狗的好同学,真不知道肿么感激你啊,昨天偶们真心期许能有多多JJ~~~
期望今天3号4号的同学能回来看看偶们~~
6#
发表于 2012-1-4 08:48:16 | 只看该作者
半个月考这么多很牛了,葱白
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