缺乏维生素D导致的软骨病称为（）
A.佝偻病
B.侏儒症
C.肥大症
D.甲旁亢
参考答案：A
_________ that the government can lead them out of the financial crisis, people are optimistic
about the future of the country.
A．Convincing
B．Convinced
C．To convince
D．Having convinced
以下哪项不是分泌性中耳炎的常见表现：（）
A.传导性听力损失
B.自听过强
C.起病时有明显耳痛
D.可见鼓室积液征
E.声导抗检查常为B型鼓室功能曲线
