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1.天气系统的()可产生平流雾。
单选题A. 冷锋后部~||~低压的后部~||~移动性高压的后部~||~移动性高压的前部
2.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
3.“无风三尺浪”是指()
单选题A. 海啸~||~风浪~||~涌浪~||~风暴潮
4.沙漠地区日较差比潮湿地区的大,()
单选题A. 晴天的气温日较差比阴天大~||~阴天的气温日较差比晴天大~||~晴天的气温日等于阴天~||~多云的气温日较差比晴天大
5.海上副热带高压中部的天气特点是()
单选题A. 风弱,闷热,多阵雨~||~风强,对流旺盛,多阵雨~||~风弱,闷热,万里无云~||~风强,干爽,万里无云
6.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
7.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
8.Fishing stake, the position of which frequently _____, exist in the area covered by this chart.
单选题A. removed~||~altered~||~corrected~||~Converted
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.陀罗航向指()
单选题A. 真北和陀罗北之间的夹角~||~真北和航向线之间的夹角~||~陀罗北和方位线之间的夹角~||~陀罗北和航向线之间的夹角
11.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
12.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
13.电子海图作为一个总概念可分为两个部分:一个部分是()电子海图数据,另一个部分是基于电子海图数据的应用系统。
单选题A. 电子海图数据~||~光栅海图~||~矢量海图~||~系统电子航海图
14.(),海洋升温和降温速度远小于陆地。
单选题A. 陆地的热容量是海水热容量的两倍~||~海水的热容量是陆地热容量的两倍~||~海水热容量与陆地相同~||~海陆热力差异与热容量无关
15.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
16.The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the ______.
单选题A. Generalcommander~||~Commandergeneral~||~On-scenecommander~||~Searchcommander
17.在船底装有发射超声波的发射换能器A和接收超声波的接收换能器B,A与B之间的距离为S,称为基线。发射换能器A以间歇方式向水下发射()
单选题A. 音频声波连续波~||~连续超声波~||~频率超声波脉冲~||~音频声波脉冲
18.500hPa等压面的平均海拔高度约为()
单选题A. 4500m~||~5000m~||~5500m~||~6000m
19.A vessel on the high seas that is not under command shall display which of the following day signals? ______
单选题A. Twoblackballs~||~Threeblackballs~||~Tworedballs~||~Threeredballs
20.低层大气中,特别是在近地面附近,风向与等压线斜交,南半球是()的气流系统
单选题A. 低层顺时针辐散~||~低层逆时针辐合~||~低层顺时针辐合~||~低层逆时针辐散
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