猪水泡病的血清学诊断方法有哪些?
参考答案:
(1)反向间接血凝试验;
(2)琼脂凝胶免疫扩散试验;
(3)病毒中和试验。
Some people who don’t like to talk much are not necessarily shy;they ______ just be quiet people.
A.must
B.may
C.should
D.would
具有较强局麻作用的镇咳药是()
A.可待因
B.右美沙芬
C.苯佐那酯
D.喷托维林
E.氯哌斯丁