分析 本文是说明文阅读,介绍了不同的味道是由四种基本的味道组成,并介绍影响味道的不同原因.
解答 16-20 CGBDE
16.C 根据空后的Still,all flavors are based on just four basic tastes:sweet,bitter,salty,and sour可知,所有的味道都是有四种基本味道组成,说明前句应该介绍世界上由这四种味道组成的不同风味.所以选项C起到串联的作用.
17.G 根据横线前句Some food experts argue there is a fifth basic taste called umami,but this theory remains controversial.可知有些专家认为还有第五种味道,但是这一理论还存在争议.但是无论基本的味道是四种还是五种,数量都不算多.故G项符合上下文串联.
18.B 根据后半句Compare this to color1s.There are only three basic color1s-yellow,red,and blue-but when mixed in different ways and proportions.可知三种基本的颜色黄、红、蓝可以组合成不同的颜色.那么味道也是一样的,四种基本味道可以组合成不同的味道.故B项"This is possible because the basic tastes combine in different proportions.不同的味道也许是因为基本的味道以不同的比例组合在一起的"符合上下文串联.
19.D 根据横线前句In fact,what we perceive as taste often involves smell more than the taste experienced through the tongue.实际上我们发现的味道通常涉及到通过舌头体验到的气味.说明横线句应该与气味有关,故D项"This is why foods with strong tastes often seem unattractive to people who,due to a stuffy nose,cannot smell them."介绍的恰好是与气味有关的内容,符合上下文串联.
20.E 根据横线后句The reason why hot,spicy foods like chili peppers are tasty is that they affect the lingual nociceptors.中的辛辣食物会对我们的语言器官有伤害.说明味觉还和我们对于疼痛的感觉有关.故E项正确.
点评 做七选五题目时要注意以下规则:1.放进去通顺,这一点是基础.凡不通顺的必错无疑;2、选项中有单词、词组、句子成分或与所选答案所在段内容重合;
3、选项与其上句或下句之间有必然的逻辑关系;4、选项全部内容都属于正确答案所在段.有时备选答案中可能含有甲乙两项内容,这时,只有当甲和乙都归属于本段时,答案才是正确的.
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