剑桥雅思10Test3阅读Passage2答案解析 Autumn leaves
2023-05-19 16:10:36 来源:中国教育在线
剑桥雅思10Test3阅读Passage2答案解析 Autumn leaves
剑桥雅思10 Test3 Passage2阅读答案解析
第14题答案:C
对应原文:C段:The source of the red is widely known: it is created by anthocyanins
答案解析:C段开头提到,红色的来源广为认知:它是有花青素制造出来的。对应题干中为叶子红色负责的物质,由此判断答案为C。
第15题答案:B
对应原文:B段:So rather than maintaining the now redundant leaves throughout the winter, the tree saves its precious resources and discards them
答案解析:B段中间提到,与其在冬天保留这些显得多余的叶子,树木选择节约宝贵的资源,并遗弃它们。即树木秋天落叶的原因,由此判断答案为B。
第16题答案:H
对应原文:H段:Even if you had never suspected that this is what was going on when leaves turn red, there are clues out there.
答案解析:G段主要是理论描述,H段通过一些现象来论证“光屏障”假说。开头提到,即便你从来都没有怀疑这就是树叶变红时发生的事情,仍然有一些线索可以证明。随后给出了三个具体的例子。对应题干中some evidence的说法,由此确定答案为H。
第17题答案:B
对应原文:B段:chlorophyll, the molecule that captures sunlight and converts that energy into new building materials for the tree.
答案解析:B段开头介绍到,叶绿素是捕捉阳光,并将其中的能量转化为新的树木生长材料的分子,即对叶绿素功能的解释。由此确定答案为B。
第18题答案:E
对应原文:E段:vivid red colours to convince herbivorous insects that they are healthy and robust and would be easily able to mount chemical defences against infestation.
答案解析:E段中提到,鲜艳的红色可能会让昆虫认为,树木很健康,能够轻易抵抗侵袭。即红色作为一种警告信号而存在,由此确定E为答案。
第19题答案:sun (light)
对应原文:H段:on many trees, the leaves that are the reddest are those on the side of the tree which gets most sun
答案解析:根据标题中“light screen”定位到G段和H段。根据most vividly coloured red与reddest的对应锁定这句话。从题干中可以判断,空上应该填一个名词,而原文中比较合适的只有sun。
第20题答案:upper
对应原文:H段:the red is brighter on the upper side of the leaf
答案解析:这道题没有明确的对应原文中的词汇。但根据上一题和下一题的位置,我们仍然可以将注意力集中于这句话上。从题干中可以推测空上应该填的是个形容词,而且是树叶的某一部分,由此锁定upper为答案。
第21题答案:dry
对应原文:H段:It has also been recognised for decades that the best conditions for intense red colours are dry, sunny days and cool nights
答案解析:根据sunny定位到这句话,题干中要填的是具体的条件,而且是白天的情况,很容易确定dry为答案。
第22题答案:north
对应原文:H段:And finally, trees such as maples usually get much redder the more north you travel in the northern hemisphere.
答案解析:顺着上一题往下,从题干中可以推测空上填的应该是个方向,由此确定north为答案。
第23题答案:FALSE
对应原文:D段:… increase a leaf’s tolerance to freezing. However, there are problems with each of these theories …
答案解析:D段中确实提到树叶变红是为了提升叶子的抗寒性。但随后就对这一理论进行了反驳。可见它并不成立。由此判断答案为FALSE。
第24题答案:TRUE
对应原文:F段:… the ‘light screen’ hypothesis. It sounds paradoxical
答案解析:这道题主要考察paradoxical与contradict的同义替换,其他成分在原文中都有出现。只要认识这两个单词,题目就很简单。
第25题答案:NOT GIVEN
对应原文:无
答案解析:原文中完全没有提到这一说法。题目属于无中生有,由此判断答案为NOT GIVEN。
第26题答案:B
对应原文:B段:As chlorophyll is depleted, other colours that have been dominated by it throughout the summer begin to be revealed.
答案解析:B段的倒数第二句提到,随着叶绿素的消退,其他在夏日里被它主导的颜色显露出来。即解释了树叶在秋天变黄或变橙的原因。而其他选项作者只是描述了相关现象,并未提供解释。由此确定B为答案。
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