企业在生产各种工业产品等过程中发生的各种耗费,称为()
参考答案:生产费用
The policeman helped the boy ______ the hotel the day before yesterday.[ ]
A .found
B. find
C. finds
D. finding
肝外胆管扩张的声像图特征是()
A."双筒枪征"
B."平行管征"
C."双边征"
D."WES"三联症
E."牛眼征"