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加单氧酶系如何组成？在生物转化中有何作用？

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The mountain is 1,000 feet _______ the sea level.

A. over
B. higher
C. above
D. high

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A famous Canadian doctor expressed the value of hobbies by saying, “______ man is really happy without a hobby．”

A. Not
B. Without
C. No
D. None

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A.castleB.vastC.wasteD.fasten

A. castle
B. vast
C. waste
D. fasten

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When Perrault published the first book in 1679, _______.

A. no story of the book had been known to people
B. some stories of the book were already well known
C. few people were interested in the stories of the book
D. stories like “Sleeping Beauty” and “Cinderella” became popular

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