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[单选题]
Air is composed of _______ gases including hydrogen, oxygen, and carbon dioxide.(1分)
A
varied
B
variable
C
differed
D
various
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参考答案
试题答案：
D
答案解释：
解题思路： 本题考查对近义形容词辨析的能力。根据题意“空气是由多种气体组成的，包括氢气，氧气，和二氧化碳”。B）选项意为“可变的，变化莫测的”；C）选项意为“不同、有异、持异议”，是过去分词，一般不作定语用；A）和D）选项都有“各种各样的”之意，A)选项指同一类事物内包含的差异，而D）选项指不同的几个类别，修饰的名词为复数，故正确答案为D）选项。
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