和同上同疑惑。除非grow做系动词用。

fashioned和were fashioned在这个句子里有什么区别？

对了，但是用了好久.....

定位第二段: particular combination of PAH's in ALH84001 is more similar to the combinations produced by decaying organisms than to those originating form nonbiological processes.团队指出ALH84001中PAH的组成和由有机物产生的PAH的组成更相似, 和由非生命体产生的PAH组成是不一样的

找出失败者和成功者的区别

定位第二段: McKay's team has demonstrated that the concentration of PAH's increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination.

最近的经济起步会导致许多人去拥有自己的汽车，车多了，由用的多了

前提是cotton bioengineered ，而结论中说的是cotton，所以的考察是全体

前提是cotton bioengineered ，而结论中说的是cotton，所以的考察是不是只要是cotton都可以分泌那个杀虫剂

定位第三行: which scientists generally agree originated on Mars

如果去掉B选项两个of, 变成presence of a buried crater, the element iridium (originating deep within the earth), and quartz 是否一样正确？

这里的连接短语与短语指什么？分词算短语吗？

A mutual fund having billions of dollars in assets will typically invest that money in hundreds of companies, rarely holding more than one percent of the shares of any particular corporation.
这句话的语序是不是还可以改成 A mutual fund having billions of dollars in assets (and rarely holding more than one percent of the shares of any particular corporation ) will typically invest that money in hundreds of companies.

最后为什么是whom呢？

完全可以忽略水流，只看打洞和缠藤俩变量。已知：小蟹打洞不会缠藤，大蟹不打洞会缠藤。现在发现：小蟹不打洞却不缠藤。为什么？因为小蟹会换壳，所以不打洞也不会缠藤。（其实就是找大小蟹的差异）

B 为啥不对呢？ 是因为slower没有比较对象吗？

现在时态 后面虚拟will

前面有natural predator

population在这里是一个集体概念

while在这里表达的是转折的意思