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1.In beaufort wind scale，sea state with moderate waves，taking longer form，many whitecaps and some spray，is named as______．
单选题A. Strongbreeze~||~Freshbreeze~||~Stronggale~||~Gale
2.（）：大量微小水滴或冰晶浮游空中，常呈乳白色，使水平能见度小于1km。
单选题A. 雾~||~毛毛雨~||~霾~||~轻雾
3.海上副热带高压中部的天气特点是（）
单选题A. 风弱，闷热，多阵雨~||~风强，对流旺盛，多阵雨~||~风弱，闷热，万里无云~||~风强，干爽，万里无云
4.气压场：锋面两侧的（）
单选题A. 气压梯度连续，等压线过锋线的折角指向低压~||~气压梯度连续，等压线过锋线的折角指向高压~||~气压梯度不连续，等压线过锋线的折角指向低压~||~气压梯度是不连续的，等压线通过锋面有指向高压的折角
5.（）附近，昼夜长短几乎相等，最热月和最冷月热量收支相差不大，气温年较差小。
单选题A. 沙漠~||~草地~||~海洋~||~赤道
6.ECS是用来显示（）的海图显示系统。
单选题A. 矢量电子海图~||~光栅海图~||~系统电子航海图~||~非官方矢量电子海图或光栅电子海图数据库
7.A correction for augmentation is included in the Nautical Almanac corrections for ______.
单选题A. theSun~||~theMoon~||~Venus~||~Noneoftheabove
8.All the crewmembers shall be at the station as required by the muster list when in firefighting drill______minutes after hearing the alarm，and the duty engineer shall be able to make the fire pumps available with______minutes．
单选题A. 2/5~||~2/3~||~3/2~||~2/2
9.南太平洋的西风漂流日流速达10nmile，沿40°～50°S纬度圈流动，属于（）
单选题A. 暖流~||~冷流~||~中性流~||~补偿流
10.船舶在海上转向后，船上罗经会有（）误差。
单选题A. 速度和冲击~||~速度和纬度~||~冲击和摇摆~||~纬度和冲
11.It takes about 12 seconds to reverse______full speed ahead______full speed astern．
单选题A. at，to~||~to，from~||~from，to~||~at，from
12.PARACEL:N TO NE 6 AND UP TO 10 IN NA. 4000 M IN FRQ SQUALLY SHWRS AND TS. SEA 2 M AND UP TO 8-9 IN NA. SWELL E TO NE 4-5. FROM the above broadcast, the visibility will be ______.
单选题A. good~||~verygood~||~poor~||~moderate
13.500hPa等压面的平均海拔高度约为（）
单选题A. 4500m~||~5000m~||~5500m~||~6000m
14.由于海面风的不同，风海流可分为（）
单选题A. 风生流和地转流~||~地转流和补偿流~||~定海流和地转流~||~定海流和风生流
15.The bow thruster generally is ineffective at ______.
单选题A. over3knotsheadway~||~atanyspeedastern~||~atanyspeedahead~||~over1knotsternway
16.If a ship will call at four ports for discharging, i.e.A.B.C and D consecutively, the cargo for ______ must generally be loaded first.
单选题A. PortA~||~PortB~||~PortC~||~PortD
17.气团的形成必须具备的条件为（）
单选题A. 大范围物理性质比较均匀的下垫面和不稳定环流条件~||~大范围比较平坦的下垫面和适当的环流条件~||~大范围物理性质不均匀下垫面和适当的环流条件~||~大范围物理性质比较均匀的下垫面和适当的环流条件
18.The correct method of switching off a marine radar is to turn power switch to ____ position fisrt, then to ______ position.
单选题A. off/standby~||~standby/off~||~standby/close~||~close/standby
19.______the survivors know more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives ______.
单选题A. Have/couldhavebeensaved~||~Have/couldhavesaved~||~Had/couldhassaved~||~had/couldhavebeensaved
20.In what units are heights and soundings in the chart？ They are in ______.
单选题A. metersandfathoms~||~fathomsandmeters~||~meterandfathom~||~fathomandmeter
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