单项选择题

A．They are not the solution to dietary problems.
B．They do not illustrate all the food groups.
C．They are not based on medical research.
D．They are only to wealthy people.
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单项选择题
A．Four.B．Forty.C．Eight.D．A number of.
A．Four.
B．Forty.
C．Eight.
D．A number of.
单项选择题
A．Education.B．Medicine.C．Handicraft.D．Literature.
A．Education.
B．Medicine.
C．Handicraft.
D．Literature.
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