[问答] 关于160字短文章的一点儿想法 [复制链接]

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发表于 2012-10-4 12:14:22 |只看该作者 |倒序浏览

今天做一篇短文章的时候突然有点儿想法，想和大家探讨探讨。请先看这篇短文。
Researchers are finding that in many ways an individual
bacterium is more analogous to a component cell of a
multicellular organism than it is to a free-living,
autonomous organism. Anabaena, a freshwater bacteria is a
case in point. Among photosynthetic bacteria, Anabaena is
unusual: it is capable of both photosynthesis and nitrogen
fixation. Within a single cell, these two biochemical
processes are incompatible: oxygen produced during
photosynthesis, inactivates the nitrogenase required for
nitrogen fixation. In Anabaena communities, however,
these processes can coexist. When fixed nitrogen
compounds are abundant, Anabaena is strictly
photosynthetic and its cells are all alike. When nitrogen
levels are low, however, specialized cells called heterocysts
are produced which lack chlorophyll (necessary for
photosynthesis) but which can fix nitrogen by converting
nitrogen gas into a usable form. Submicroscopic channels
develop which connect the heterocyst cells with the
photosynthetic ones and which are used for transferring
cellular products between the two kinds of Anabaena cells.
(156 words)

8.It can be inferred from the passage that cell differen-
tiation within Anabaena is regulated by the
(A) amount of oxygen Anabaena cells produce
(B) season of the year
(C) amount of fixed nitrogen compounds available
(D) number of microscopic channels uniting
Anabaena cells
(E) amount of chlorophyll in Anabaena cells

9.The author uses the example of Anabaena to illustrate
the
(A) uniqueness of bacteria among unicellular organ-
isms
(B) inadequacy of an existing view of bacteria
(C) ability of unicellular organisms to engage in
photosynthesis
(D) variability of a freshwater bacteria
(E) difficulty of investigating even the simplest
unicellular organisms

首先这篇文章的篇幅是160字的，但是它的问题只有两个，其中一个还是易做的主题题。花很长时间去理解那些复杂的科学现象是不是有点儿性价比不高呢？不知道大家对这类告诉你一个现象或者论点然后一堆延伸、展开、解释的无评价色彩的文章是怎么做的？因为没有评价，题目肯定主要考内容，所以我一般这种文章都是全篇读下来做题。但是今天看这个文章突然想试试略读证据能不能做题。当然我是做完之后才有的这个想法啊~
略读这篇文章的证据是需要勇气的，因为文章主体部分实际就是A生物的一系列行为作为证据支持前面的论点。不过，大胆地略了！直接做题。第一题问的是differentiation是由什么来调节的。定位依据应该在differentiation，文中对应部分应该体现这种不同，所以会在对比、转折处，扫读证据，发现一个however，但是这个转折强调的是coexist，跟differentiation应该关系不大（也可能有，先跳过），看到后面又有一个however，前面还有个when从句，基本可以确定这就是答案了，因为when正是表示条件，与题干的由什么调节契合，再仔细看看后面，specialized cell are produced，这应该就是differentiation的过程了。所以直接选出答案C。第二个题当然是证明论点。这里面选项感觉都不太好，但是还是很容易排除其他四个，选择A。我觉得如果时间紧的话，这么做肯定是很适合的，就是不知道这么做的普适性如何，能不能推而广之？打算今天下午拿几个类似的文章做一做，验证一下。

欢迎大家发表意见啊！不管是赞同的还是反对的！