原发性腹膜炎细菌侵入腹膜的途径不包括()
A.血行扩散
B.上行性感染
C.直接扩散
D.透壁性感染
E.腹腔内原发病灶
参考答案:E
— do you exercise?
— Twice a week.
A.How long
B.How many
C.How often
D.How soon
机动车在哪些情况下需打右转向灯?