鸡马立克氏病诊断常用的血清学试验是。
A、HA及HI试验
B、AGP试验
C、ELSA试验
D、间接血凝试验
参考答案:B
--I have too much housework to do at home! --____ ask your husband for help?
A.You could
B.Why don’t
C.Why not
D.How about
记忆保持的时间超过1分钟以上是()
A、短时记忆
B、感觉记忆
C、长时记忆
D、瞬时记忆