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1.The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the ______.
单选题A. Generalcommander~||~Commandergeneral~||~On-scenecommander~||~Searchcommander
2.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
3.在水流影响较大的海域航行时,应输入对()速度。
单选题A. 天~||~地~||~水~||~船
4.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
5.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
6.AIS每分钟可以处理()个以上报告。
单选题A. 1000~||~2000~||~3000~||~4000
7.______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
8.温带气旋而言,表示风力()
单选题A. 8~9级~||~10~11级~||~≥10级~||~12级
9.用户与卫星间的几何关系对定位误差影响的大小,可用()GDOP(Geometric Dilutionof Precision)来表示。
单选题A. 精度几何因子~||~三维位置精度几何因子~||~水平方向精度几何因子~||~高程精度几何因子
10.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
11.海图数据库包含海图及其他航海出版物的基础数据ENC及其更新数据,它们在系统内形成()供航海者使用
单选题A. ECDIS~||~ENC~||~SENC
12.The circular steel structure installed around the propeller of a towboat is the______.
单选题A. nozzle~||~shroud~||~strut~||~Hood
13.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
14.______get your engine ready before six tomorrow morning.
单选题A. You’dbetter~||~Youwouldbetter~||~Youatleast~||~Youatmost
15.通常在近地层风速具有明显的日变化特征,主要表现为()
单选题A. 白天小夜间大~||~白天大夜间小~||~白天和夜间一样大~||~昼夜均小
16.在大气成分中,()是影响大气温度分布及其天气变化的主要成分。
单选题A. 氧气臭氧和惰性气体~||~氮气二氧化碳和惰性气体~||~二氧化碳臭氧和水汽~||~二氧化碳臭氧和惰性气体
17.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
18.7级风速为()m/s。
单选题A. 108-138~||~6-10~||~8-12~||~139-171
19.目标的位置(距离和方位)数据在捕获后即可显示,目标的CPA在()左右(性能标准规定在1min之内)才能显示。
单选题A. 10s~||~20s~||~30s~||~40s
20.在远离海岸的深海中,表层风海流的流向()
单选题A. 与风向反向~||~在北半球偏于风的去向右边45°~||~与风向同向~||~在北半球偏于风的来向右边45°
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