题型:判断题 They were surrounded by the enemy, but they________at last from the village. [ ]A. managed escaping B. tried to escapeC. managed to escape D. tried escaping 查看答案
题型:判断题 4周龄北京鸭发病,病鸭食欲减少,喜卧,拉稀,排暗红色粪便,羽毛蓬松,发病几天后有零星死亡。剖检病死鸭发现,小肠弥漫性出血,肠壁肿胀、出血,肠黏膜粗糙,覆盖一层糠麸样或奶酪样或胶冻样黏液。对该鸭病的诊断还需进行的有意义的检查是A.心血触片 B.病毒的分离鉴定 C.细菌的分离鉴定 D.粪便检查 E.血象检查 查看答案