Form and Function B.6 Gas Exchange (id: 3191ffaa0)

本题目来源于试卷: Form and Function B.6 Gas Exchange，类别为 IB生物学

[单选题]
The image below compares the mortality rate for smokers ra(v47a;de j.glg g5 mvwpu: rn)02i sand non-smokers over tm1i* abohl(7q he age of 40 *7bi(1oqhalm.

A. Smoking is the cause of early death.
B. More smokers survive at the age of 90.
C. A smoker and a non-smoker have the same chances of survival at the age of 70.
D. After 60 years old, more non-smokers survive compared to smokers.


参考答案:  D


本题详细解析:

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