某猪场 9 至 12 日龄仔猪突然发病,先呕吐,继而水样腹泻,粪便为黄色,绿色或白色等。 有的还有未消化的乳凝块,病仔猪明显脱水、体温升高,应用抗菌药治疗无效,提供大多数猪 再出现症状后,二至七天内死亡,剖检见胃内充满乳凝块,胃底粘膜充血、出血,肠内充 满水样粪便,肠壁变薄呈半透明状。若需鉴别诊断最有效的方法是( ) A. 生化检查 B. 血常规检查 C. 饲料检查 D. RT-PCRE. E. 琼脂扩散实验
【简答题】阅读理解 We all long for friendship, but how to make a friend? 'The best time to make a friend is before you need one.' Joy Steven said. The following are some tips for you. People equal friends Friends u...