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1.In the daytime, you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows ______.
单选题A. ablackball~||~ablackcone~||~twoblackcones~||~abasket
2.The circular steel structure installed around the propeller of a towboat is the______．
单选题A. nozzle~||~shroud~||~strut~||~Hood
3.通常将海陆热力差异形成的季风称为海陆季风，它主要出现在（）
单选题A. 低纬地区~||~高纬地区~||~极地地区~||~赤道地区
4.罗北线与磁北线之间的角度 称为（）
单选题A. 磁差~||~自差~||~罗经差~||~陀罗差
5.BASHI: E TO SE 9-10. 500M IN HVY SQUALLY SHWRS AND TS. SEA 8-9M. SWELL SE 6-7M. From the above forecast, the wind in Beaufort Scale will be ______.
单选题A. STRONGGALETOSTORM~||~GALETOSTRONGGALE~||~NEARGALETOGALE~||~STRONGBREEZETONEARGALE
6.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
7.My ship sailed______port of Shanghai，bound______Rotterdam．
单选题A. from，for~||~for，on~||~on，at~||~at，from
8.On no account can they cut it______it be fouled.
单选题A. Do~||~would~||~shall~||~should
9.鞍形气压区，两个高压之间的狭长区域称为（）
单选题A. 低压带~||~高压带~||~低压槽~||~高压脊
10.锋面雾最常形成于锢囚气旋中和气旋中暖锋接近中心的部分。多在（）和暖锋前产生，有时缓行冷锋后也形成。
单选题A. 冷锋前~||~冷锋后~||~暖锋后~||~锢囚锋两侧
11.In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your ______.
单选题A. NNW~||~WSW~||~ESE~||~SSW
12.（）是冷、暖气团势力相当，互有进退，锋面在小范围内来回摆动的锋。
单选题A. 冷锋~||~暖锋~||~准静止锋~||~锢囚锋
13.______20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions(捕获) are possible．
单选题A. Asmanyas~||~Somanyas~||~Asmuchas~||~Asmoreas
14.一些小型船舶安装的B类AIS设备，发射功率低，信息更新间隔延长至（）
单选题A. 10s~||~20s~||~30s~||~40s
15.1997年11月27日，IMO（）通过了《船载航行数据记录仪(VDR)性能标准》A.861(20)号决议。
单选题A. 第18次会议~||~第19次会议~||~第20次会议~||~第21次会议
16.电子海图作为一个总概念可分为两个部分：一个部分是（）电子海图数据，另一个部分是基于电子海图数据的应用系统。
单选题A. 电子海图数据~||~光栅海图~||~矢量海图~||~系统电子航海图
17.当夏季风盛行时，则表现为（）的气候特征。
单选题A. 低温潮湿和少雨~||~高温干燥和少雨~||~高温潮湿和多雨~||~低温潮湿和多雨
18.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
19.In what units are heights and soundings in the chart？ They are in ______.
单选题A. metersandfathoms~||~fathomsandmeters~||~meterandfathom~||~fathomandmeter
20.在空盒气压表上读数后，除温度订正外，还需进行（）才能得到本站气压。
单选题A. 刻度订正和纬度订正~||~高度订正和刻度订正~||~刻度订正和补充订正~||~高度订正和补充订正
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