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1.______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
2.(),以数字表示、单位为km。
单选题A. 温度~||~降水量~||~水平能见度~||~现在天气现象
3.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
4.可以促使水汽在一定温度下凝结长大。()→云消散。
单选题A. 上升运动~||~上升运动+水汽~||~水平运动+水汽~||~下沉运动
5.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
6.()是影响海面能见度的主要因子。
单选题A. 风~||~浪~||~流~||~雾
7.一些小型船舶安装的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
8.______the survivors know more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives ______.
单选题A. Have/couldhavebeensaved~||~Have/couldhavesaved~||~Had/couldhassaved~||~had/couldhavebeensaved
9.在潮汐推算中,如主港3月6日低潮时为2357,低潮时差为+0103,则附港为发生同一低潮应在()
单选题A. 3月6日2254~||~3月7日0100~||~3月7日0003~||~3月6日0100
10.My vessel______bad weather with winds reaching force 9 on her way home.
单选题A. encountered~||~faced~||~found~||~Met
11.低层大气中,特别是在近地面附近,风向与等压线斜交,南半球是()的气流系统
单选题A. 低层顺时针辐散~||~低层逆时针辐合~||~低层顺时针辐合~||~低层逆时针辐散
12.影响海面能见度的因子除雾外,还有()
单选题A. 风霾雨雪和低云等~||~沙尘暴霾雨雪和中云等~||~沙尘暴霾雨雪和高云等~||~沙尘暴霾雨雪和低云等
13.硬铁部分所获得的磁性可以看做在相当长的时间内是稳定的,故称为()
单选题A. 永久船磁~||~感应船磁~||~磁罗经~||~自差罗经
14.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°
15.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
16.在平静的大洋航行时,雷达只用于避碰观测,采用()是最方便的选择。
单选题A. H-up~||~N-up~||~C-up~||~真方位TB
17.Get searchlight______for transiting the canal at night.
单选题A. on~||~already~||~Almost~||~ready
18.温带气旋而言,表示风力()
单选题A. 8~9级~||~10~11级~||~≥10级~||~12级
19.()是常温下发生相变(固、气、液三态)的唯一大气成分,它也是造成云、雨、雪、雾等现象的主要物质源泉。
单选题A. 氮气~||~水汽~||~二氧化碳~||~臭氧
20.船位报告是()
单选题A. 一天三次的船位例行报告~||~为保持报告系统有效而进行的在必要时刻做出的报告~||~中午船位~||~船舶转向后作的船位报告
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