新城疫常用的诊断方法为()。
A.免疫电泳试验
B.琼脂扩散试验
C.HI
参考答案:C
企业债券的种类有很多,按照还本付息的期限可分为( )。
A.短期企业债券
B.中期企业债券
C.记名企业债券
D.长期企业债券
E.不记名企业债券
At first the man refused to say anything but _____ when shown the evidence he and told everything. [ ]
A. broke down
B. broke out
C. gave up
D. gave away