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1.用一个扇形区(虚线)表示其未来移动方向和中心可能到达的位置。扇形前面概率圆边上的数字表示预报日期和时间,概率圆的概率约为()
单选题A. 100%~||~80%~||~70%~||~50%
2.一些小型船舶安装的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
3.Radar is used not only to look______,but also to measure their distances away from you.
单选题A. atobscuredobjects~||~forwardsubmergedtargets~||~upexposedtargets~||~forunseenobjects
4.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
5.罗经柜通常由()等非磁性材料制成,主要用来支撑罗盆和安放消除的自差校正器。
单选题A. 铁和铜~||~铜铝木~||~钢和铁~||~铁镍合金
6.()为南海季风转换月份,风向不稳定,海流处于转换之中,比较零乱。
单选题A. 1月和7月~||~3月和9月~||~4月和10月~||~6月和12月
7.A pattern according to which vessels and / or aircraft may conduct a co-ordinated search is a ___________.
单选题A. Researchpattern~||~Researchmode~||~Searchpattern~||~Searchandrescuemode
8.通常在中纬地区陆地上交角约为(),在海面上约为10°~20°。
单选题A. 30°~35°~||~35°~45°~||~45°~50°~||~50°~55°
9.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
10.()附近,昼夜长短几乎相等,最热月和最冷月热量收支相差不大,气温年较差小。
单选题A. 沙漠~||~草地~||~海洋~||~赤道
11.陀罗方位是指()
单选题A. 真北和航向线之间的夹角~||~真北和方位线之间的夹角~||~陀罗北和航向线之间的夹角~||~陀罗北和方位线之间的夹角
12.一般地面反气旋中心气压值在()
单选题A. 1000~1020hPa之间,目前的最高记录是10533hPa~||~1040~1060hPa之间,目前的最高记录是10833hPa~||~1020~1040hPa之间,目前的最高记录是10833hPa~||~一般在980~1000hPa之间,目前的最高记录是10333hPa
13.“东风送湿,西风送干”的交换方式属于()
单选题A. 平流~||~辐射~||~湍流~||~对流
14.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
15.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
16.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
17.______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
18.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
19.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
20.灯塔是雷达良好的目标,雷达的发现距离一般在()之外。
单选题A. 5nmile~||~6nmile~||~7nmile~||~6nmile
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