We can realize how deeply a finger is put into water at body temperature ______. Which of the following is TRUE?

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问题 We can realize how deeply a finger is put into water at body temperature ______.
Which of the following is TRUE?

选项 A、Man is sensitive to the ultra-violet.
B、Man is more color-conscious than the honey-bee.
C、The honey-bee is blind to red.
D、The honey-bee can see far more colors than man.

答案C

解析 蜜蜂是红色色盲。
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