填空题

According to researchers, what factor or factors affect cognitive aging

【参考答案】

Education, chronic illness, and standard of living.
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单项选择题
A．To do comprehensive exercises.B．To read simple sentences.C．To copy out from the textbooks.D．To do all of the above.
A．To do comprehensive exercises.
B．To read simple sentences.
C．To copy out from the textbooks.
D．To do all of the above.
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trigger
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