请问有一类的CR题目是先给出一个现象,然后说这个现象的出现是有两个决定因素的,一是什么什么,二是什么什么,然后说一般会怎么怎么样,但是现在不这样,问你为什么。这种题在Helr的分类里应该归纳为哪一种题型啊?我已经碰到这种题三四次了,很容易做错。谢谢!
下面给个我做错的例题:
Microscopicplants called algae grow inside the top layer of sea ice in the Antarctic ifenough sunlight reaches that layer of ice and enough seawater, which containsnutrients, reaches that layer after splashing onto the surface. Even though moderate snow cover reduces thesunlight that filters into the top layer, sea ice with moderate snow cover typicallycontains even more algae in the top layer than does sea ice with less snowcover. Whichof the following, if true, most helps to explain the apparent discrepancy? (A)As the weight of accumulated snow forces ice lower in the water, more seawatersplashes onto the surface and seeps through the snow. (B)Seawater in the Antarctic often contains higher concentrations of nutrientsthan does seawater in more temperate regions. (C)As the air temperature around sea ice decreases during the winter, thelikelihood decreases that snow will fall and thus add to any existing snowcover. (D)The nutrients on which algae rely are common in seawater throughout theAntarctic. (E)More sunlight filters through a layer of ice than through an equally thicklayer of snow.
正确答案是A,题目我可以理解,就是想弄清楚这道题属于Helr里的哪种类型,从哪个角度思考比较好,谢谢大家!
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