不知道大家做没做36套EX25的第二题啊

怎么这么深UID: 3442111

这道题选什么，有选C的，有选D的。。。对应老G的哪一篇啊

怎么这么深UID: 3442111

Since 1953, many experimental attempts to synthesize the chemical constituents of life under "primitive Earth conditions" have demonstrated that a variety of the complex molecules currently making up living organisms could have been present in the early ocean and atmosphere, with only one limitation: such molecules are synthesized far less readily when oxygen-containing compounds dominate the atmosphere. Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia. From these studies, scientists have concluded that the surface of the primitive Earth was covered with oceans containing the molecules fundamental to life. Although, at present, scientists cannot explain how these relatively small molecules combined to produce larger, more complex molecules, some scientists have precipitously ventured hypotheses that attempt to explain the development, from larger molecules, of the earliest self-duplicating organisms.
2.It can be inferred from the passage that "some scien-
tists" assume which of the following concerning "
larger, more complex molecules"
(A) The earliest atmosphere was forward primarily
of these molecules.
(B) Chemical processes involving these molecules
proceeded much more slowly under primitive
Earth conditions.
(C) The presence of these molecules would necessarily
precede the existence of simple organisms.
(D) Experimental techniques will never be sufficiently
sophisticated to produce in the laboratory simple
organisms from these chemical constituents.
(E) Explanations could easily be developed to
explain how simple molecules combined to
form these more complex ones.

怎么这么深UID: 3442111

做过的同学一起讨论下啊，:lol:lol

怎么这么深UID: 3442111

我好像明白了，题干是说some scientist关于larger more complex molecules假设了什么，既然之前的问题scientist还没有解决，这些some scientists就要去解决下一个更深层次的问题了，那么他们肯定是以为现有技术解决不了之前的问题了(也就是how these relatively small molecules combined to produced...)

Leon-WangUID: 2772364

吴中东地质学第9篇，答案是C。91年2月的题。

怎么这么深UID: 3442111

Leon-Wang 发表于 2013-9-7 15:13
吴中东地质学第9篇，答案是C。91年2月的题。

能不能麻烦解释下呢

Leon-WangUID: 2772364

怎么这么深 发表于 2013-9-7 15:25
能不能麻烦解释下呢

好像有那么两个阶段，小分子（氢气甲烷什么的）到大分子，大分子到earliest self-duplicating organisms。问题问的是大分子

A说的是小分子，毙了
B文章说的是readily，所以那时是快而不是慢，所以反了，毙了。
D没有讲实验室啊够不够复杂啊什么的，毙了
E小分子到大分子这个过程文章说cannot explain，选项说easily，所以反了，毙了。

C说这些大分子在organisms之前，符合文章的意思，正确。

怎么这么深UID: 3442111

Leon-Wang 发表于 2013-9-7 16:05
好像有那么两个阶段，小分子（氢气甲烷什么的）到大分子，大分子到earliest self-duplicating organisms。 ...

恩 D太绝对了，C很显然some scientists会这么想。

HardyNiborUID: 3461489

Leon-Wang 发表于 2013-9-7 16:05
好像有那么两个阶段，小分子（氢气甲烷什么的）到大分子，大分子到earliest self-duplicating organisms。 ...

刚做到这个，也没搞懂。牛逼。