反映甲状腺功能状态的最好指标是( )
A.血浆总T3、T4浓度B.血浆结合型T3、T4浓度C.血浆T3浓度D.血浆游离甲状腺素浓度E.血浆甲状腺素结合能力
参考答案:D
点A的坐标是(-3,1),那么点A到x轴的距离是______.
China has successfully sent up two manned spaceships, which is a _____ achievement that all Chinese
people can take great pride in. [ ]
A. brilliant
B. primary
C. professional
D. permanent