最急性型小鹅瘟多见于1周龄内的雏鹅或雏番鸭。发病率可达100%,病死率高达95%以上。
A. 对
B. 错
急性型小鹅瘟的症状包括( )。
A. 腹泻,排灰白或青绿稀粪,混有气泡。
B. 呼吸困难,鼻流出浆液性分泌物。
C. 喙端、爪色泽变暗。
D. 死前两腿麻痹或抽搐。
How long will it take for Randy to Tianjing from Beijing?
A. 30minutes
B. 30hours
C. 30days
D. 13minutes
How often does the Randy couple visit each other?
A. twice a week
B. twice a month
C. once a week
D. once a month