16.一道英语选择题,求详解Whilehewasinvestig
While he was investigating ways to imve the telescope,Newton made__discovery which completely vhanged__mains understanding of colour. Aa,/ Bthe,/ C/,the D/,/
A 前面指一项发现，泛指，用a; 后面man不用冠词，表示人，人类