2. 外语
  3. Among people who suffer from colour blindness, ______ . According to the passage, bats and adult owls cannot see colours ______

Among people who suffer from colour blindness, ______ . According to the passage, bats and adult owls cannot see colours ______

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问题 Among people who suffer from colour blindness, ______ .
According to the passage, bats and adult owls cannot see colours ______ .
选项 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
答案D
解析 细节题。这道题可从第四段第一、二句中找到答案，这两句告诉我们在夜晚捕食的鸟和动物的眼睛几乎或根本没有视锥细胞(cone)，所以不能区别颜色。蝙蝠或猫头鹰就属于这样的动物。故D正确。
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