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1.极地大陆气团(Polar continental air mass)：（），空气层结稳定。
单选题A. 干燥低温天气晴朗~||~低温潮湿多阴天~||~干燥低温气层不稳定~||~干燥低温常阴天
2.表层海水温度是指海水表面到（）深处之间的海水温度，以摄氏度(℃)为单位。
单选题A. 05m~||~1m~||~2m~||~5m
3.某地当日潮汐资料为：1200400cm，1900136cm，则潮高为300cm的潮时为（）
单选题A. 1350~||~1457~||~1500~||~1330
4.STS--（）(Severe Tropical Storm)，风力10～11级(风速48～63kn)
单选题A. 热带风暴~||~风暴警报~||~强热带风暴~||~大风警报
5.If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere？ ______.
单选题A. South-southwesterly~||~North-northwesterly~||~South-southeasterly~||~North-northeasterly
6.The approach to the roads and harbor from the______entails no difficulty．
单选题A. eastern~||~easterly~||~eastward~||~Eastwards
7.冬季，长江口以北海域盛行偏北季风，（）多为西北浪和北向浪。
单选题A. 渤海黄海东海南海~||~东海南海~||~黄海东海~||~渤海黄海
8.从地面到大气上界将大气层分为5层，依次为（）
单选题A. 对流层平流层中间层热层散逸层~||~对流层平流层中间层散逸层热层~||~对流层散逸层中间层热层平流层~||~对流层等温层中间层热层散逸层
9.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
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.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
12.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
13.入射雷达波与目标表面的夹角（），称为雷达视角
单选题A. (0°～90°)~||~(45°～90°)~||~(90°～130°)~||~(130°～175°)
14.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
15.适宜的风场：一般认为（）风有利于平流雾的发展。
单选题A. 无风~||~2～4级~||~5～6级~||~7～8级
16.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
17.从地面向上随着高度的增加而空气密度则（）
单选题A. 缓慢递减~||~迅速递减~||~缓慢递增~||~迅速递增
18.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
19.（）地区日较差比潮湿地区的大。
单选题A. 沙漠~||~大洋~||~沿岸~||~内陆
20.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
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