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．The lifecycle of trees.B．The number of trees.C．The intensity of solar burning.D．The quality of air.
A．The lifecycle of trees.
B．The number of trees.
C．The intensity of solar burning.
D．The quality of air.
单项选择题
A．Fried potatoes.B．Tomato juice.C．Sweet corn.D．Chocolate beans.
A．Fried potatoes.
B．Tomato juice.
C．Sweet corn.
D．Chocolate beans.
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