A.逗號(hào)B.空格C.分號(hào)D.減號(hào)
A.暗適應(yīng)B.局部適應(yīng)C.本能適應(yīng)D.亮適應(yīng)
A.觀摩示范的經(jīng)驗(yàn)B.設(shè)計(jì)的經(jīng)驗(yàn)C.直接經(jīng)驗(yàn)D.觀察的經(jīng)驗(yàn)