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    Essential Biology Study Set 2
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    Exam 23: Circulation and Respiration
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    Cigarette Smoking ________
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Cigarette Smoking ________

Question 18

Question 18

Multiple Choice

Cigarette smoking ________.


A) is responsible for about one in five deaths of Americans every year
B) accounts for 80-90% of all cases of lung cancer
C) can affect the health of nonsmokers through secondhand smoke
D) all of the above

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