单项选择题

A．How animals survive harsh conditions in the wild.
B．How animals alter colors to match their surroundings.
C．How animals protect themselves against predators.
D．How animals learn to disguise themselves effictively.
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单项选择题
A．He had psychic powers.B．He was an educated man.C．He went to school at the age of six.D．He died in 1929.
A．He had psychic powers.
B．He was an educated man.
C．He went to school at the age of six.
D．He died in 1929.
单项选择题
A．By greeting each other very politely.B．By exchanging their views on pubic affairs.C．By displaying their feelings and emotions.D．By asking each other some personal questions.
A．By greeting each other very politely.
B．By exchanging their views on pubic affairs.
C．By displaying their feelings and emotions.
D．By asking each other some personal questions.
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