单项选择题

From the style of this passage one might assume that it was taken from ________.

A．a report on marketing
B．a guide book
C．directions for a stage setting
D．an information essay
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单项选择题
Some scientists believe that there is no evidence that cholestrol in food is directly linked to_____.
A．blood disease
B．heart disease
C．infectious disease
D．mental disorder
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