鉴别原发性与继发性甲状腺功能减退症,应进行的检查是
A TSH B
FT<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13377003_0.gif"> C
FT<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13377003_0_1.gif"> D
TT<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13377003_0_2.gif"> E
TT<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20221202/13377003_0_3.gif">