Children under l. 2m in height             in the concert.     [ ]

A. allow                  

B. are allowed    

C. aren't allow              

D. aren't allowed

闭经患者未接受治疗前确定闭经的最初步骤是( )

A．脑CT检查

B．孕激素试验

C．甲状腺功能亢进

D．PRL检测

E．HCG检测