单选题
The Japanese doctors find out that ______.
A、
our brains are aging too early
B、
our brains are not getting enough exercise
C、
Japanese farmers are ageing at a relatively early age
D、
Japanese farmers are losing their ability to think
【正确答案】
C
【答案解析】
细节题。文章第一段第二句指出，日本医生发现，我们的大脑没有得到足够的锻炼，所以C正确。
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