冻鱼用什么车装运?
参考答案:
冷藏车装运。冷藏车:是运输易腐货物的专用车,车体采用夹层结构和隔热材料。
______ difficult the problem was, he tried his best to solve it.
A.No matter
B.Although
C.Whatever
D.However
层次型、网状型和关系型数据库划分原则是
A.记录长度
B.文件的大小
C.联系的复杂程度
D.数据之间的联系方式