病原体更换宿主的过程称为()。
A.传播过程
B.传染过程
C.传播机制
D.致病机制
E.流行过程
参考答案:C
Foods _____good, like milk and cookies, are called comfort foods because they make you feel better.
A.tastes B.tasting C.to taste D tasted
瘿病的常见病因是()
A.水土失宜
B.情志内伤
C.老欲久病
D.体质因素
E.素体阴虚