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1.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
2.观测时间一律使用世界时(UTC)，每天按（）观测四次。
单选题A. 00Z06Z12Z18Z~||~03Z09Z15Z21Z~||~00Z12Z~||~08Z14Z20Z02Z
3.台风眼区的天气特征为（）
单选题A. 风力最大暴雨~||~风力较弱暴雨~||~风力较大无雨~||~风力较弱无雨
4.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
5.In what units are heights and soundings in the chart？ They are in ______.
单选题A. metersandfathoms~||~fathomsandmeters~||~meterandfathom~||~fathomandmeter
6.______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
7.南太平洋的西风漂流日流速达10nmile，沿40°～50°S纬度圈流动，属于（）
单选题A. 暖流~||~冷流~||~中性流~||~补偿流
8.PUBLIC ADDRESS SYSTEM:LOUDSPEAKERS IN THE VESSEL’S CABINS, MESS ROOMS, ETC., AND ON DECK VIA WHICH IMPORTANT INFORMATION CAN BE BROADCAST FROM A CENTRAL POINT, MOSTLY FROM THE NAVIGATION BRIDGE defines ______.
单选题A. AA-system~||~PP-system~||~PA-system~||~AP-system
9.（），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
10.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
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.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
13.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
14.浓雾警报，则海面能见度为（）。
单选题A. 05～5nmile~||~小于05nmile~||~小于2nmile~||~2～5nmile
15.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
16.（）是冷、暖气团势力相当，互有进退，锋面在小范围内来回摆动的锋。
单选题A. 冷锋~||~暖锋~||~准静止锋~||~锢囚锋
17.在国外地面天气图上，低压中心标注“（）”。
单选题A. C~||~A~||~L~||~H
18.The bow thruster generally is ineffective at ______.
单选题A. over3knotsheadway~||~atanyspeedastern~||~atanyspeedahead~||~over1knotsternway
19.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
20.热带风暴(Tropical Storm，简写（）)。
单选题A. TD~||~TS~||~STS~||~T
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