【单选题】The differences lies in the following expect ______ of the parts.
【单选题】People are surprised to learn that _______.
A.
Negroes' achievements are not shown in history books
B.
Phillis Wheatley learned English
C.
Negroes are good at mathematics
D.
Negroes have a very long history in America
【单选题】一群成年番鸭突然发病,病死率在60%以上,临床表现主要为体温升高、两腿麻痹、排绿色稀粪。剖检见食道黏膜出血、水肿和坏死,并有灰黄色伪膜覆盖或溃疡;泄殖腔黏膜出血;肝有坏死点。该群鸭发生的疾病可能是
【单选题】One of the facts that reflect the primitiveness of airline industry is ______.
A.
its history is much longer than that of car industry
B.
it is composed of international and domestic carriers
C.
its market is divided by many a relatively small carriers
D.
it is still an industry of comparatively low profits
【简答题】(题干)一群成年番鸭突然发病,病死率在60%以上,临诊表现主要为体温升高、两腿麻痹、排绿色稀粪。剖检见食管黏膜出血、水肿和坏死,并有灰黄色伪膜覆盖或溃疡;泄殖腔黏膜出血;肝有坏死点。该群鸭发生的疾病可能是A.鸭瘟 B.禽流感 C.鸭病毒性肝炎 D.番鸭细小病毒病 E.鸭疫里默氏杆菌病 首选的确诊方法是A.细菌分离 B.病毒分离 C.易感动物接种 D.病理组织学检查 E.ELISA抗体检测 对该群鸭...
【单选题】一群成年番鸭突然发病,病死率在60%以上,临床表现主要为体温升高、两腿麻痹、排绿色稀粪。剖检见食道黏膜出血、水肿和坏死,并有灰黄色伪膜覆盖或溃疡;泄殖腔黏膜出血;肝有坏死点。该群鸭发生的疾病可能是( )