单项选择题

A．When hunting for food.
B．When sleeping.
C．When being attacked.
D．When communicating with their cousins.
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单项选择题
A．They change color every 50 minutes.B．They change color more quickly.C．They change color more slowly.D．They change color on the same schedule.
A．They change color every 50 minutes.
B．They change color more quickly.
C．They change color more slowly.
D．They change color on the same schedule.
填空题
L
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