单项选择题

The phrase "this relationship"( in Line 3, Para. 5 )refers to the connection between ______and the incidence of heart disease.

A．the amount of fish eaten
B．regular fish-eating
C．the kind of fish eaten
D．people of different regions
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单项选择题
The passage is mainly about ______.
A．the high incidence of heart disease in some countries
B．the effect of fish eating on people's health
C．the changes in people's diet
D．the daily fish consumption of people in different cultures
单项选择题
How many lives could probably be saved each year in the United States by eating fish according to the Dutch study
A．550,000.
B．275,000.
C．110,000.
D．852.
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