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1.通常将海陆热力差异形成的季风称为海陆季风，它主要出现在（）
单选题A. 低纬地区~||~高纬地区~||~极地地区~||~赤道地区
2.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
3.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
4.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
5.The circular steel structure installed around the propeller of a towboat is the______．
单选题A. nozzle~||~shroud~||~strut~||~Hood
6.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°
7.船载AIS设备能够通过（）本船的静态信息、动态信息、航次相关信息和安全相关短消息。
单选题A. 寻址方式单独发送~||~寻址方式群发发送~||~雷达发送~||~广播方式周期性自动播发
8.A vessel engaged in fishing shall not impede the passage of______following a traffic lane．
单选题A. (1)~||~(1)&(2)~||~(3)~||~(4)
9.How many GMDSS operators are needed/required on board according to the provisions of the International Convention for the Safety of Life at Sea，1974？______．
单选题A. 4operators~||~3operators~||~2operators~||~1operator
10.（）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
11.（）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
12.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
13.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
14.通常反气旋的强度(intensity)以（），中心气压值越高，表示反气旋越强。
单选题A. 中心最高气压表示~||~最里面闭合等压线数值表示~||~最外面闭合等压线数值表示~||~中心最低气压表示
15.一些小型船舶安装的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
16.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
17.定位精度，PSNGOOD表示飞机定位，误差（）
单选题A. 小于20nmile~||~20～30nmile~||~20～40nmile~||~大于40nmile
18.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
19.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
20.从地面向上随着高度的增加而空气密度则（）
单选题A. 缓慢递减~||~迅速递减~||~缓慢递增~||~迅速递增
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