问题
单项选择题
下列哪项不是判断地方病的依据（）。
A.当地不同居民的发病率均高
B.外地类似居民的发病率均低
C.外地迁入该地的居民均不发病
D.迁出该地的居民发病率下降
E.当地动物中也可能发生类似疾病
答案
参考答案：C
解析：迁入该地区的人经一段时间后，其发病率和当地居民一致。
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下列哪项不是判断地方病的依据（）。
A.当地不同居民的发病率均高
B.外地类似居民的发病率均低
C.外地迁入该地的居民均不发病
D.迁出该地的居民发病率下降
E.当地动物中也可能发生类似疾病
参考答案：C
解析：迁入该地区的人经一段时间后，其发病率和当地居民一致。
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