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三副197道题

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.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.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

4.12HOURS GALE WARNING VALID FROM 1103990700 UTC. From this phrase, the waring is expected to be valid from ______.

单选题

A. 0700UTCMAR11,1999~||~0700UTCNOV03,1999~||~0700UTC,1103UTC,1999~||~NOVMAR19990700UTC

5.极地大陆气团(Polar continental air mass):(),空气层结稳定。

单选题

A. 干燥低温天气晴朗~||~低温潮湿多阴天~||~干燥低温气层不稳定~||~干燥低温常阴天

6.赤道气团(Equatorialairmass):大致位于南北纬10°以内的洋面。具有()的天气特征

单选题

A. 干热稳定少有降雨天气~||~高温潮湿层结不稳定多雷阵雨~||~湿热稳定多狂风暴雨天气~||~高温潮湿稳定无大风天气

7.若使斯伯利37型罗经主轴经过减幅阻尼摆动后趋于稳定位置,其阻尼重物必须加在()

单选题

A. 随动部分西例~||~随动部分东侧~||~灵敏部分西侧~||~灵敏部分东侧

8.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

9.In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the ______.

单选题

A. southtoeast~||~northtowest~||~northtoeast~||~southtowest

10.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

11.有资料表明,一个三级浮标装了五角反射器后,探测距离可从1.5nmile增加到()

单选题

A. 25nmile~||~3nmile~||~35nmile~||~4nmile

12.在摩擦层中,水平气压梯度力的方向是()。

单选题

A. 垂直等压线由低压指向高压~||~垂直等压线由高压指向低压~||~斜穿等压线由低压指向高压~||~斜穿等压线由高压指向低压

13.The circular steel structure installed around the propeller of a towboat is the______.

单选题

A. nozzle~||~shroud~||~strut~||~Hood

14.气压是大气压强的简称,它与天气的关系是()

单选题

A. 低气压一般对应阴雨天气~||~高气压一般对应阴雨天气~||~高气压中心对应大风天气~||~低气压对应晴好天气

15.500hPa等压面的平均海拔高度约为()

单选题

A. 4500m~||~5000m~||~5500m~||~6000m

16.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

17.风向是指风的来向,海上通常用度数表示,记整数,正北记为0°;风速以m/s为单位,记到小数一位。静风时,风速记0.0,()

单选题

A. 风速记为"0"~||~风速记为"-"~||~风向记为"-"~||~风向记为"C"

18.In what units are heights and soundings in the chart? They are in ______.

单选题

A. metersandfathoms~||~fathomsandmeters~||~meterandfathom~||~fathomandmeter

19.My ship sailed______port of Shanghai,bound______Rotterdam.

单选题

A. from,for~||~for,on~||~on,at~||~at,from

20.选择双向推荐航线时,应将航线设计在推荐航线()适当的地方,以尽可能地避免航行中与来船构成对遇和不协调避让局面。

单选题

A. 右侧~||~左侧~||~任何一侧~||~推荐航线上

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