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1.用一个扇形区(虚线)表示其未来移动方向和中心可能到达的位置。扇形前面概率圆边上的数字表示预报日期和时间，概率圆的概率约为（）
单选题A. 100%~||~80%~||~70%~||~50%
2.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
3.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
4.在2006年3月召开的COMSAR（）上，《LRIT性能标准草案》获得通过。
单选题A. 第9次会议~||~第10次会议~||~第11次会议~||~第12次会议
5.It takes about 12 seconds to reverse______full speed ahead______full speed astern．
单选题A. at，to~||~to，from~||~from，to~||~at，from
6.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
7.It is the responsibility of the crane operator to, at all times, be aware of the location of the __.
单选题A. load~||~hook~||~boom~||~Alloftheabove
8.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
9.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
10.降水主要来自高层云和（）
单选题A. 层云~||~雨层云~||~淡积云~||~积雨云
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
12.12HOURS GALE WARNING VALID FROM 1103990700 UTC. From this phrase, the waring is expected to be valid from ______.
单选题A. 0700UTCMAR11，1999~||~0700UTCNOV03，1999~||~0700UTC，1103UTC，1999~||~NOVMAR19990700UTC
13.因霾使天空的云量、云状全部或部分不明时，（），相应栏记录可辨明部分的云状;若透过这些现象能完全辨明云量、云状时，则按正常情况记录。
单选题A. 低云状栏记"∞"，总低云量栏记"-"~||~云状栏记"∞"，总低云量栏记10~||~云状栏记"-"，总低云量栏记"-"~||~云状云量栏均不作记录
14.在国外地面天气图上，低压中心标注“（）”。
单选题A. C~||~A~||~L~||~H
15.南半球的东南信风越过赤道进入北半球之后，受地转偏向力作用转变为（）
单选题A. 西风~||~西南风~||~西北风~||~北风
16.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
17.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
18.在空气纬度和密度相同时，高气压区中等压线的分布规律是（）
单选题A. 曲率半径越小的地方越密集~||~曲率半径越大的地方越稀疏~||~曲率半径越小的地方越稀疏~||~等压线疏密与曲率半径无关
19.表层海水温度是指海水表面到（）深处之间的海水温度，以摄氏度(℃)为单位。
单选题A. 05m~||~1m~||~2m~||~5m
20.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
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