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Natural selection tends to eliminate genes that cause inherited diseases, acting
Natural selection tends to eliminate genes that cause inherited diseases, acting
游客
2024-01-10
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问题
Natural selection tends to eliminate genes that cause inherited diseases, acting most strongly against the most severe diseases; consequently, hereditary diseases that are (i)____ would be expected to be very (ii)____, but, surprisingly, they are not.
选项
A、lethal…rare
B、untreated…dangerous
C、unusual…refractory
D、new…perplexing
E、widespread…acute
答案
A
解析
空格(i):
- 方程等号:consequently表示因果,同义重复。
- 强词和对应:hereditary diseases和inherited diseases同义重复,指遗传病,that引导定语从句修饰hereditary diseases,severe指向空格(i),取同,体现病是“严重的”。lethal致命的,untreated未得到治疗的,unusual不同寻常的,new新的,widespread普遍的。untreated表示病“没有得到治疗”,不体现病“严重”,untreatable才是“无法治疗的”。因此选项A合适。
空格(ii):
- 方程等号:consequently表示因果,前后逻辑同向,句意同义重复。
- 强词和对应: 自然选择消除(eliminate)严重的疾病,eliminate指向空格(ii),根据consequently取同,体现病被“消灭”。rare罕见的,dangerous危险的,refractory顽固的,perplexing令人困惑的,acute剧烈的。综合空格(i),答案选A。
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