Because it changes color in a regular 24,hour rhythm．,B-找考题网

单项选择题

A．Because it changes color in a regular 24-hour rhythm.
B．Because it changes color in response to the sun’s rays.
C．Because it constantly changes color.
D．Because it changes color every hour.

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单项选择题

A．Supply their own light.B．Locate food and enemies.C．Compensate for the lack of light.D．Both B and C.

A．Supply their own light.
B．Locate food and enemies.
C．Compensate for the lack of light.
D．Both B and C.

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