题目内容

Farmers are increasingly losing touch with their ________for managing the land.

A. distinct
B. distinctive
C. extinct
D. instinct

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She is the most ________creature I ever put my eyes on.

A. insolent
B. migrant
C. immigrant
D. indigenous

We have been preparing our fighters to ________themselves to civil society.

A. apply
B. adjust
C. allow
D. arrange

He had to ________ around for a while when one of his legs was injured.

A. benefits
B. affects
C. limp
D. effects

嘧啶环的合成与嘌呤环的合成有何异同?

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