单项选择题

What is NOT said to be a benefit of eating fruits and vegetables?
A.They satisfy hunger.
B.They aid in digestion.
C.They provide important vitamins.
D.They are a good source of fiber.

A.They
B.
B.They
C.
C.They
D.
D.They
E.

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某些影响因素对房地产价格的影响可以用数学模型来度量。( )

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荷载分项系数：永久荷载为( )。

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