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1.冬季，长江口以北海域盛行偏北季风，（）多为西北浪和北向浪。
单选题A. 渤海黄海东海南海~||~东海南海~||~黄海东海~||~渤海黄海
2.______get your engine ready before six tomorrow morning．
单选题A. You’dbetter~||~Youwouldbetter~||~Youatleast~||~Youatmost
3.天气分布是三维空间的，为了比较全面地揭示天气状况，在气象分析和预报中，通常绘制三种类型的天气图，即（）。
单选题A. 高空图为等高面图地面图为等压面图~||~高空图地面图均为等压面图~||~地面天气图高空天气图和辅助图~||~高空图地面图均为等高面图
4.If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere？ ______.
单选题A. South-southwesterly~||~North-northwesterly~||~South-southeasterly~||~North-northeasterly
5.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
6.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
7.STS--（）(Severe Tropical Storm)，风力10～11级(风速48～63kn)
单选题A. 热带风暴~||~风暴警报~||~强热带风暴~||~大风警报
8.阵性降水历时短，强度变化很快，骤降骤止，天空时明时暗，降水来自浓积云和（），并常伴有阵性大风等特点。
单选题A. 积雨云~||~淡积云~||~雨层云~||~层云
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.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
11.（）是影响海面能见度的主要因子。
单选题A. 风~||~浪~||~流~||~雾
12.6和12nmile量程上有效，跟踪距离应至少延伸至（）。
单选题A. 10nmile~||~11nmile~||~12nmile~||~13nmile
13.Do not______the watch to the relieving officer until he has verbally expressed his acknowledgment of the information which has been passed by the officer handing over．
单选题A. turnover~||~handover~||~handsoff~||~takeover
14.象灯塔、教堂尖顶及锥形浮标等这类锥形目标的反射性能很差，只有当雷达波与其母线（），其反射性能才和圆柱形目标相同
单选题A. 交叉时~||~平行~||~互相成180°角时~||~垂直时
15.下列正确的说法是（）
单选题A. 毛毛雨落在水面有波纹，落在甲板上无湿斑~||~毛毛雨落在水面无波纹，落在甲板上有湿斑~||~小雨落在水面会激起波纹或水花，落在甲板上可留下湿斑~||~小雨落在水面无波纹，落在甲板上可留下湿斑
16.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
17.Navigational warnings and weather bulletins for shipping ______ from Singapore Radio.
单选题A. broadcast~||~broadcasted~||~arebroadcast~||~arebroadcasted
18.引起雷达测距随机误差的原因主要有（）
单选题A. 气象海况目标反射能力雷达设备能力~||~气象海况目标反射能力雷达较准~||~气象海况雷达较准雷达调整~||~雷达较准目标反射能力雷达设备能力
19.自由陀螺仪指（）
单选题A. 高速旋转的三自由度陀螺仪~||~主轴可指向空间任意方向的陀螺仪~||~不受任何外力矩作用的平衡陀螺仪~||~重心与其中心相重合的三自由度陀螺仪
20.（）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
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