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【简答题】
(题干)某鸡场300只34日龄鸡发病，发病率90%，病死率80%。病鸡伸颈张口呼吸，咳嗽，气喘，有鼻漏;部分鸡翅、腿麻痹，下痢，粪带血;剖检见嗉囊积液，全身性黏膜和浆膜出血，盲肠扁桃体肿胀、出血该病的病原可能是A.新城疫病毒 B.柔嫩艾美耳球虫 C.传染性法氏囊病病毒 D.传染性支气管炎病毒 E.传染性喉气管炎病毒 进一步诊断首先应选择的检测方法是A.易感鸡接种 B.致病指数测定 C.粪便球虫卵囊检查 D.鸡胚接种与病原鉴定 E.血清ELISA抗体检测 对该鸡群应采取的措施是A.疫苗紧急接种 B.环境清洁消毒 C.病鸡隔离饲养 D.污染物无害化处理 E.扑杀与无害化处理
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举一反三
【单选题】If family A has an income of $95,000 per year, and family B has an income of $35,000 per year, and each has a child attending a 4-year public university, to the nearest $1000, how much more would fami...
A.
$4000
B.
$7000
C.
$10,000
D.
$12,000
E.
$15,000
【单选题】A)He has to read a history book. B) He is too busy to go with her. C) He has already visited the museum. D) He must hand in a report about the museum.
A.
He has to read a history book.
B.
He is too busy to go with her.
C.
He has already visited the museum.
D.
He must hand in a report about the museum.
【简答题】The Palace Museum has another name “ the F______ City”.
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