第18题: [单项选择]Having two eyes, instead of one, is particularly useful for ______. A. seeing at night B. seeing objects far away C. looking over a wide area D. judging distances 参考答案:D 答案解析:此考题为细节题。根据文章第5段第1句Having two good eyes is important for judging distances,便可以旨定D正确。