用作改善制剂外观的着色剂是（）

A.羟苯酯类

B.阿拉伯胶

C.阿司帕坦

D.胡萝卜素

E.氯化钠

Medical treatment aboard a ship should not go beyond examination and emergency care without first consulting（）.

A.the designated medic aboard

B.the shore based superintendent

C.a medical doctor

D.the approved company medical manual