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1.使锋面向冷空气一侧倾斜的主要原因是()
单选题A. 气压梯度力作用~||~地球自转运动的作用~||~水平方向的空气流动~||~冷暖气团相互抬挤
2.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
3.热带风暴(Tropical Storm,简写TS),风速()(风力8~11级)。
单选题A. 34~47kn~||~34~63kn~||~48~63kn~||~45~55kn
4.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
5.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
6.______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
7.Navigational warnings and weather bulletins for shipping ______ from Singapore Radio.
单选题A. broadcast~||~broadcasted~||~arebroadcast~||~arebroadcasted
8.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
9.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
10.罗北偏离真北的角度称为()
单选题A. 磁差~||~自差~||~罗经差~||~陀罗差
11.()是影响海面能见度的主要因子。
单选题A. 风~||~浪~||~流~||~雾
12.间接回波的方位通常在()
单选题A. 船首标志线上~||~船尾线方向~||~盲区内~||~阴影扇形内
13.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
14.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
15.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°
16.(),海洋升温和降温速度远小于陆地。
单选题A. 陆地的热容量是海水热容量的两倍~||~海水的热容量是陆地热容量的两倍~||~海水热容量与陆地相同~||~海陆热力差异与热容量无关
17.Several shoals______reported to exist in the area southwest of the Brothers.
单选题A. have~||~havebeen~||~has~||~hasbeen
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.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
20.温带气旋而言,表示风力()
单选题A. 8~9级~||~10~11级~||~≥10级~||~12级
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