第23题: [单项选择]绵马贯众的原植物为 A. 紫萁科 B. 鳞毛蕨科 C. 蚌壳蕨科 D. 乌毛蕨科 E. 球子蕨科 参考答案:B
第24题: [单项选择]When must the Master of a vessel log the position of load line marks in relation to the surface of the water in the Official Logbook?() A. Once a day B. At the change of every watch C. Only when in fresh or brackish water D. Prior to getting underway 参考答案:D