我国对公司DOC年度签注是如何进行的？
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）. ["A vessel towed","A vessel not under command and unable to maneuver","A vessel anchored giving warning of her position","A vessel stopped dead in the water"]
下列国家中实行社会医疗保险模式的国家是（）。 ["德国","日本","奥地利","澳大利亚","丹麦","阿根廷"]
酸浴中（）浓度过高易造成纤维内外层再生速度不均一内应力较高。 ["A.硫酸","B.硫酸锌","C.硫酸钠","D.助剂"]
营销员接听电话时，如遇重要内容，应做好（），然后及时转达有关部门负责人，不得延误。 ["接听准备","准备","心理准备","详细笔录"]
如何确定船种？
