下列家禽传染病不能采用HA-HI试验诊断的为()
A. 传染性喉气管炎
B. 新城疫
C. 鸡减蛋综合征
D. 鸡毒支原体感染
E. 禽流感
Virtual booksellers present a threat to public morality because they______.
A. profit from books on terror and violence
B. have lost reliable quality guardians
C. neglect works of classical literature
D. escape the supposed responsibility for book content
The authors attitude towards Amazon s censorship on book content can be best described as______.
A. disapproval
B. supportive
C. scornful
D. skeptical
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