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The availability of oxygen is an essential (i)____ for animal life, while carbon
The availability of oxygen is an essential (i)____ for animal life, while carbon
游客
2025-02-20
40
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问题
The availability of oxygen is an essential (i)____ for animal life, while carbon dioxide is equally (ii)____ for plant life.
选项
A、choice…optional
B、duplication…selective
C、conversion…exchangeable
D、condition…necessary
E、luxury…harmful
答案
D
解析
空格(ii):
- 方程等号:equally体现同样地,后面的特征在前文出现过,同义重复。
- 强词和对应:前文说氧气对动物生命是很重要的(essential),essential指向空格(ii),根据equally取同,体现二氧化碳对植物生命是同样“重要的”。optional可选择的,selective选择的,exchangeable可互换的,necessary必要的,harmful有害的。选项D合适。
空格(i):
- 方程等号:is,同义重复。
- 强词和对应:前面说氧气的可获得性,空格(i)体现氧气对动物生命的“可获得性”,availability指向空格(i)取同。choice选择(错),duplication复制(错),conversion转变(错),condition条件(对),luxury奢侈(错)。氧气的多少是生命“无法选择的”,因此排除选项A condition的释义是an environmental requirement。因此正确答案选D。
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