注意：此页面搜索的是所有试题
题目内容
（大学英语第二册）
13. According to the passage, bats and adult owls cannot see colors.
A. because they hunt at night
B. because they cannot see light
C. because they have no cones and rods
D. because they have no cones
A. because they hunt at night
B. because they cannot see light
C. because they have no cones and rods
D. because they have no cones
参考答案
