单项选择题

A．1968.
B．1918.
C．1964.
D．1946.
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单项选择题
A．Very GoodB．GoodC．FairD．Poor
A．Very Good
B．Good
C．Fair
D．Poor
问答题
The following graph shows cancer risk factors. Look at the graph and write an essay of about 120 words making reference to the following points: 1) The various different factors causing cancer 2) The corresponding measures taken to prevent the possible cancer.
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