单项选择题

The black and white stripes of the zebra are most useful form ______.

A．hunters
B．nocturnal predators
C．lions and tigers
D．insectivorous Vertrbrata
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单项选择题
Aggressive resemblance occurs when ______.
A．a predaceous attitude is assumed
B．special resemblance is utilized
C．an animal relies on speed
D．an animal blends in with its background
单项选择题
The title below that best expresses the ides of this passage is ______.
A．Cryptic coloration for Protection
B．How Animals Survive
C．The uses of Mimicry in Nature
D．Resemblances of Animals
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