哪项生化指标有助于鉴别特发性甲旁减与假性甲状旁腺功能减退症()
A．血钙
B．血磷
C．血镁
D．PTH
E．血钠
参考答案：D
May I take a seat here? ---_________.
A．Yes, please
B．Yes, it is
C．Sorry, it isn’t
D．No, you may
进入CFB锅炉冷渣器的炉渣温度一般降到（）℃。
A.50
B.100
C.150
D.200
