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Total color blindness, ________, is the result of a defect in the retina.A、a rar
Total color blindness, ________, is the result of a defect in the retina.A、a rar
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2023-10-22
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问题
Total color blindness, ________, is the result of a defect in the retina.
选项
A、a rare condition that
B、a rare condition
C、that a rare condition
D、is a rare condition
答案
B
解析
罕见的完全色盲是由视网膜的缺陷造成的。同位语结构题。本句已有的部分结构完整,空格所填部分可以是名词或名词词组作主语的同位语。四个选项中只有B项符合以上语法要求,故B项为答案。
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