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1.当夏季风盛行时，则表现为（）的气候特征。
单选题A. 低温潮湿和少雨~||~高温干燥和少雨~||~高温潮湿和多雨~||~低温潮湿和多雨
2.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
3.（）和AIS航标还能够为船舶提供导航和多种附加信息服务。
单选题A. AIS岸基设施~||~GPS导航仪~||~VHF收发信机~||~计算机
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.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
6.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
7.“东风送湿，西风送干”的交换方式属于（）
单选题A. 平流~||~辐射~||~湍流~||~对流
8.根据干湿球温度表读数的差异变化可以推算平流雾的生消，当干湿球温度的读数趋于一致时，则（）
单选题A. 出现平流雾~||~雾在逐渐消失~||~不会出现平流雾~||~向生雾的趋势发展
9.温带气旋而言，表示风力（）
单选题A. 8～9级~||~10～11级~||~≥10级~||~12级
10.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
11.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
12.一些小型船舶安装的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
13.根据（）的不同特征又可以将对流层分为行星边界层或摩擦层和自由大气。
单选题A. 气温~||~大气运动~||~湿度~||~气压
14.气压梯度的大小取决于等压线的疏密程度。等压线越密集，（）
单选题A. 水平气压梯度小~||~水平气压梯度大~||~垂直气压梯度小~||~垂直气压梯度大
15.A vessel engaged in fishing shall not impede the passage of______following a traffic lane．
单选题A. (1)~||~(1)&(2)~||~(3)~||~(4)
16.In what units are heights and soundings in the chart？ They are in ______.
单选题A. metersandfathoms~||~fathomsandmeters~||~meterandfathom~||~fathomandmeter
17.某地当日潮汐资料为：1200400cm，1900136cm，则潮高为300cm的潮时为（）
单选题A. 1350~||~1457~||~1500~||~1330
18.由于作用在单位质量空气上的压力在水平方向上分布不均匀，所产生的力称为（）
单选题A. 惯性离心力~||~地转偏向力~||~水平摩擦力~||~水平气压梯度力
19.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
20.在远离海岸的深海中，表层风海流的流向（）
单选题A. 与风向反向~||~在北半球偏于风的去向右边45°~||~与风向同向~||~在北半球偏于风的来向右边45°
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