Many industrial robots perform tasks that are ill-suited either to human hands and eyes or are so onerous or strenuous that people do not want to do them.


are ill-suited either to human hands and eyes or are so onerous or strenuous

are either ill-suited to human hands and eyes or they are so onerous or strenuous so

either ill-suited to human hands and eyes or are so onerous or strenuous

either are ill-suited to human hands and eyes or so onerous or strenuous so

either are ill-suited to human hands and eyes or are so onerous or strenuous

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题目分析：

本题中我们能看到平行触发语either…or…，两者连接的内容需要在逻辑上和语形上保持一致。具有两者择一的关系（either…or…）的应该是“不适合人类的手和眼的任务”与“太费力了以至于人类比较做的任务”。这两者需要在语法上保持平行，可以排除(A)(B)(C)(D)，答案为(E)。

选项分析：

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