单项选择题

The author mentions all the following as ways of disease prevention EXCEPT _____.

A．better diet
B．increased exercise
C．reduction on smoking
D．higher survival rate for cancer
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单项选择题
Which of the following is NOT true of chronic diseases in the U. S.
A．They account for 70% of all deaths.
B．They are responsible for most of the health care costs.
C．They often result in unhealthy lifestyles.
D．They are largely preventable.
单项选择题
What the author discussed in the previous section is most probably about _____.
A．classification of reasoning
B．some special types of reasoning
C．relationships between causes and results
D．some other common types of reasoning
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