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1.受地球自转的影响并在控制力矩的作用下，陀螺仪主轴将作（）的摆动。
单选题A. 螺旋线等幅~||~双曲线等幅~||~圆型等幅~||~椭圆等幅
2.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
3.某轮候潮过浅滩时，需计算所需潮高，若某轮吃水7.5米，要求富裕水深0.5米，浅滩的海图水深4.3米，则通过浅滩所需的潮高为（）。
单选题A. 27米~||~113米~||~37米~||~123米
4.远离或尚未影响到预报责任区时，根据需要可以发布“消息”，预计未来（）内将影响本责任区的沿海地区或登临时发布警报
单选题A. 24h~||~48h~||~72h~||~36h
5.在海平面上大气压为1013hpa，高度每升高1000英尺(304.8m)，降低（）
单选题A. 35hpa~||~36hpa~||~37hpa~||~38hpa
6.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
7.在海平面上温度为15℃，高度每升（）高英尺，降低2℃
单选题A. 1000~||~2000~||~3000~||~4000
8.It is dangerous for vessels without the use of radar______the estuary(河口)．
单选题A. toget~||~toapproach~||~toproceed~||~toclose
9.硬铁部分所获得的磁性可以看做在相当长的时间内是稳定的，故称为（）
单选题A. 永久船磁~||~感应船磁~||~磁罗经~||~自差罗经
10.______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
11.The circular steel structure installed around the propeller of a towboat is the______．
单选题A. nozzle~||~shroud~||~strut~||~Hood
12.If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere？______.
单选题A. Easttonortheast~||~Easttosoutheast~||~Northtonorthwest~||~Southtosoutheast
13.根据（）的不同特征又可以将对流层分为行星边界层或摩擦层和自由大气。
单选题A. 气温~||~大气运动~||~湿度~||~气压
14.危险货物报告是（）
单选题A. 船舶载有危险货物时所做出的报告~||~当船载危险货物在距岸200nmile范围内散失时所做出的报告~||~当船载危险货物在大洋上散失时所做出的报告~||~当船载危险货物在距岸100nmile范围内散失时所做出的报告
15.（）是常温下发生相变(固、气、液三态)的唯一大气成分，它也是造成云、雨、雪、雾等现象的主要物质源泉。
单选题A. 氮气~||~水汽~||~二氧化碳~||~臭氧
16.______get your engine ready before six tomorrow morning．
单选题A. You’dbetter~||~Youwouldbetter~||~Youatleast~||~Youatmost
17.AIS目标的缺省显示为（）
单选题A. 休眠目标~||~激活目标~||~危险目标~||~丢失目标
18.In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the ______.
单选题A. southtoeast~||~northtowest~||~northtoeast~||~southtowest
19.降水主要来自高层云和（）
单选题A. 层云~||~雨层云~||~淡积云~||~积雨云
20.气压是大气压强的简称，它与天气的关系是（）
单选题A. 低气压一般对应阴雨天气~||~高气压一般对应阴雨天气~||~高气压中心对应大风天气~||~低气压对应晴好天气
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