【单选题】某猪场1月龄仔猪,出现跛行卧地症状,由于饲养员、兽医防治人员知识缺乏,怀疑是链球菌感染,只进行简单抗生素治疗,一天后猪只不仅见好转,反而加重,在猪蹄冠部、鼻端出现米粒至黄豆大小水泡,部分仔猪发生死亡;剖检病死猪发现心肌变化明显,质地稍柔软,表面呈灰白、浑浊,在室中隔,心房及心室面散在灰黄条纹与斑点状病灶,分布于正常心肌间,似虎皮状,称之“虎斑心”。根据病状,此病最可能是( )
【单选题】听力原文:W: Professor Stevenson, as an economist, how do you look upon the surging Chinese economy? Does it constitute a threat to the rest of the world? M: I believe China's economic success should be se...
A.
Its rapid growth is beneficial to the world.
B.
It can be seen as a model by the rest of the world.
C.
Its success can't be explained by elementary economics.
D.
It will continue to surge forward in the future.