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【单选题】

The___ is prey for the desert snake.

A.
lizard
B.
frog
C.
spider
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【单选题】Survival of the fittest is a synonym for (adaptation to the environment / natural selection / useful traits).
A.
adaptation to the environment
B.
natural selection
C.
useful traits
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【单选题】When it hides on the ocean floor, only the___ of the flounder can be seen.
A.
fin
B.
tail
C.
eyes
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【简答题】( ) (n.) animals that kill and eat other animals.
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【简答题】( ) (n.) the way in which an animal’s color or shape matches its surroundings and makes it difficult to be seen.
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【简答题】( ) (n.) the state of continuing to exist.
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【简答题】( ) (v.) to change in order to be more suitable for a new situation.
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【简答题】( ) (n.) animals that are hunted, killed, and eaten by other animals.
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【简答题】( ) (v.) to copy the behavior of someone or something.
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【简答题】( ) (v.) to be or look like something or someone else.
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【简答题】( ) (adj.) easily seen or understood; clear.
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