胃溶型薄膜衣材料是()。
A.CMC-Na
B.HPC
C.HPMCP
D.EC
E.MCC
参考答案:B
解析:
[知识点] 包衣的材料与工序
Making cargo plan for appropritate distribution of the cargo on board is()duty.
A.a ship's officer's
B.a tallyman's
C.a port planner's
D.a foreman's
介绍一下列车有线和无线通话系统?