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？
