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1.AIS目标的缺省显示为()
单选题A. 休眠目标~||~激活目标~||~危险目标~||~丢失目标
2.已知磁差Var=2°W,罗经差1°W,磁航向000°,则真航向为()
单选题A. 357°~||~358°~||~359°~||~003°
3.500hPa等压面的平均海拔高度约为()
单选题A. 4500m~||~5000m~||~5500m~||~6000m
4.在国外地面天气图上,低压中心标注“()”。
单选题A. C~||~A~||~L~||~H
5.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
6.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
7.All the crewmembers shall be at the station as required by the muster list when in firefighting drill______minutes after hearing the alarm,and the duty engineer shall be able to make the fire pumps available with______minutes.
单选题A. 2/5~||~2/3~||~3/2~||~2/2
8.My ship sailed______port of Shanghai,bound______Rotterdam.
单选题A. from,for~||~for,on~||~on,at~||~at,from
9.In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?______.
单选题A. Southtowest~||~Southtoeast~||~Northtowest~||~Northtoeast
10.()是影响海面能见度的主要因子。
单选题A. 风~||~浪~||~流~||~雾
11.气压观测应在()
单选题A. 正点前15min进行~||~接近正点进行~||~正点前10min进行~||~正点前30min进行
12.地理经度和地理纬度的度量范围分别是()
单选题A. 0~90o,0~90o~||~0~180o,0~180o~||~0~90o,0~180o~||~0~180o,0~90o
13.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
14.温带气旋而言,表示风力()
单选题A. 8~9级~||~10~11级~||~≥10级~||~12级
15.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
16.Many of the lights on this coast are placed so high as to be frequently obscured by______.
单选题A. power~||~tower~||~cover~||~lowclouds
17.气团离开源地后,使气团发生变性慢的情况是()
单选题A. 所经下垫面比气团冷~||~所经下垫面与气团温度相等~||~气团移动速度慢~||~所经下垫面比气团暖
18.()是在海面风的作用下形成的海水水平方向的流动,又称风流。
单选题A. 补偿流~||~地转流~||~风海流~||~潮流
19.海浪干扰在扫描起始点周围形成()
单选题A. 辐射状点线~||~鱼鳞状闪亮随机回波斑点~||~无明显边缘的疏松棉絮状的亮斑区~||~密集点状回波群
20.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
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