单项选择题


A．at
B．by
C．on
D．in
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单项选择题
Which is the main idea of the last paragraph
A．The reason why eyespots work.
B．The reasoning power of some animals.
C．A defective faculty of perceiving.
D．The eyespots of butterflies.
单项选择题
Which of the following is NOT cited as an example to show the protective nature of eyespots
A．Frogs.
B．Fish.
C．Peacocks.
D．Butterflies.
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