诊断原发性甲减的最灵敏的放免指标是()
A.TSH升高
B.T下降
C.吸I率下降
D.TGAb升高
E.TPO升高
参考答案:A
How to create enough jobs for the laid-off workers is a(n)________problem for which there is no simple solution.
A.delicate
B.internal
C.emergency
D.complex
三相对称负载星形连接时,线电压是相电压的()倍
A、3
B、1
C、3
D、1/3