搜题
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第1题

15. Which of the following is not true about insects? A. Insects can see more colors than human beings. B. Insects ca
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第2题

14. According to the passage, dogs and cats. A. can see colors as well as human beings B. as well as human beings can
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第3题

13. According to the passage, bats and adult owls cannot see colors. A. because they hunt at night B. because they ca
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第4题

12. When millions of rods in our eyes are at work in darkness we can see. A. shapes only B. shapes and colors C. co
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