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Andpracticallyeverythingthat's______ forchildrenisunhealthy_______foods

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Oneneversees____ingredientsbeingadvertisedonTV. It'snevera____orapeach.

Butanumberofscientists______ theassumptionthatthepresenceofalienspeciescanneverbe_______ inanaturalecosystem.

Cafescertainlyareavery_______ marketsector.Therearemorethan______ inourcity,andwefelttheyareallrathersimilartoeachother.

若一颗满二叉树有n个结点,深度为h,则下面关系正确的是()

A. n=h+m
B. n=2^h-1
C. m=n/2
D. n=m+1

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