ETS都玩起了套娃?这一手操作厉害了
这年头,连ETS都玩起了套娃,你有被套路过吗?
所谓的“套娃”指的是文章会陈述多个对象,彼此之间形成直接或间接的形成环环相扣的因果关系。由于牵涉的对象较多,读这类文章的关键就在于从文字当中提炼出对象之间的正负关联,从而更直观地反映出它们之间的联系。
比如下面这段文字:
把文字转换为逻辑链之后,我们就能很容易得知因素之间的正负相关性,有利于理清做题思路。
比如下面这道机经真题:
B. beaver数量过去遭到elk觅食行为的负面影响。正确,1995年之前没有狼的时期,elk啃食树叶导致beaver数量减少,对其造成负面影响。
B. 它减少了在河边(streamsides)觅食的麋鹿数量。正确,植被茂密的地方(dense cover)以及河边都可能有肉食动物潜伏,狼回归之后麋鹿更喜欢在开阔的地区(open areas)活动。
接下来给大家留一道作业,欢迎同学们积极留言,把答案和思路写在评论区,我们会在下午6:00前公布置顶正确答案~
In explaining his opposition to efforts aimed at stabilizing moose populations and at suppressing fires in northern forests, Pastor points out that moose, by feeding on hardwood trees, contribute to a characteristic process whereby hardwood trees are eventually overtaken and shaded out, as conifers such as spruces block sunlight. A decline in hardwood trees leads to fewer nitrogen-rich, quick-rotting leaves on the forest floor, which is increasingly carpeted with slower-rotting conifer needles. Hardwoods require more nitrogen for growth than do conifers, so the decline in soil fertility in areas where moose feed reinforces the advance of conifers. But conifers cannot dominate the forest for long, because mature conifer forests are more combustible than are hardwood forests. Fire combined with high winds, attacks of spruce budworm, or even a greatly diminished nitrogen supply will destroy expanses of spruces, allowing hardwoods to recolonize in the nutrient-rich ash. Such oscillations in forest composition and consequently in moose population are, Pastor believes, essential to the integrity and functioning of northern forest ecosystems.
❓The passage suggests which of the following about conifers?
A. They enrich the soil with nitrogen more than do hardwood.
B. They are relatively long-lived compared with hardwoods.
C. They require nutrient-rich ash in order to recolonize.
D. They are adversely affected by increases in moose populations.
E. They are adversely affected by extremely low levels of nitrogen.
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