单项选择题

A．9.
B．20.
C．11.
D．16.
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单项选择题
A．Los Angeles.B．San Francisco.C．Universal Studios and Disneyland.D．Both A and B.
A．Los Angeles.
B．San Francisco.
C．Universal Studios and Disneyland.
D．Both A and B.
单项选择题
A．Proteins.B．Low-quality protins.C．Poor dietary habits.D．Healthy diets.
A．Proteins.
B．Low-quality protins.
C．Poor dietary habits.
D．Healthy diets.
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