单项选择题
A.钙 B.钾 C.碘 D.镁 E.铁
A.>50% B.<50% C.>40% D.>20% E.<30%
A.血清FT3和TSH B.血清FT4和TSH C.血清TSH D.血清T3 E.血清rT3
A.<25% B.25%～50% C.<50% D.>50% E.<10%
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