What do you do? [ ]
A. I'm Miss White.
B. I'm a teacher.
C. I go to school every day.
答案:B
下列哪一种疾病属于缺乏激素引起的( )
A.巨人症
B.甲亢
C.佝偻病
D.侏儒症
简述课的类型(种类)