通过对（）的比较研究，可以充分认识同一病原体（或病因）对不同机体带来的各种损害。
A.人兽共患病
B.自然发生
C.遗传发生
D.模仿发生
参考答案：A
—Could you please tell me ______?
— Sorry, I don't know, either. [ ]
A. what the matter is with him
B. where they will go for their holiday
C. that he has gone to Beijing
D. how long can the book be kept
股肿早期治疗原则是：
A．理气活血，清热利湿B．清热利湿，活血通络C．温阳利水，活血化瘀D．凉血清热，活血通络E．化痰软坚，利水消肿
