下列哪项不是散发性呆小病的病因
A.甲状腺胚胎发育缺陷B.甲状腺缺如C.异位甲状腺D.母孕期缺碘E.甲状腺激素合成酶缺陷
参考答案:D
解析:母孕期缺碘可导致地方性先天性甲低。
With the________of making a fortune, many people went to Australia in the 19th century to wash
sand for gold. [ ]
A. task
B. intention
C. trade
D. appointment
在C 语言中,只有在使用时才占用内存单元的变量,其存储类型是______。
A.auto 和 register
B.extern 和register
C.auto 和static
D.static 和register