题目

常温下进行下列处理，能发生颜色变化的是www.ks5.u.com    A．向重铬酸钾溶液中充入CO2              B．在葡萄糖溶液中加入斐林试剂    C．在淀粉与碘液的混合液中加入唾液       D．向氨基酸溶液中加入双缩脲试剂 答案：CIt was too dark ________.A. to see anything B. to see something C. seeing anything D. see anything