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1.硬铁部分所获得的磁性可以看做在相当长的时间内是稳定的,故称为()
单选题A. 永久船磁~||~感应船磁~||~磁罗经~||~自差罗经
2.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
3.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
4.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
5.Several shoals______reported to exist in the area southwest of the Brothers.
单选题A. have~||~havebeen~||~has~||~hasbeen
6.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
7.遇有船只避让等特殊情况不能准时观测时,可在()补测完毕,并在记录表中有关栏内注明。
单选题A. 正点前30min~||~正点后1h内~||~正点后2h内~||~正点后30min内
8.MODERATE WAVES, TAKING A MORE PRONOUNCED LONG FORM;MANY WHITE HORSES ARE FORMED. This sea condition is likely to be termed ______.
单选题A. neargale~||~moderatebreeze~||~freshbreeze~||~strongbreeze
9.适宜的风场:一般认为()风有利于平流雾的发展。
单选题A. 无风~||~2~4级~||~5~6级~||~7~8级
10.(),以数字表示、单位为km。
单选题A. 温度~||~降水量~||~水平能见度~||~现在天气现象
11.在平静的大洋航行时,雷达只用于避碰观测,采用()是最方便的选择。
单选题A. H-up~||~N-up~||~C-up~||~真方位TB
12.锋面雾最常形成于锢囚气旋中和气旋中暖锋接近中心的部分。多在()和暖锋前产生,有时缓行冷锋后也形成。
单选题A. 冷锋前~||~冷锋后~||~暖锋后~||~锢囚锋两侧
13.______20 targets can be tracked at one time.When maximum tracking capacity is reached,no further acquisitions(捕获) are possible.
单选题A. Asmanyas~||~Somanyas~||~Asmuchas~||~Asmoreas
14.入射雷达波与目标表面的夹角(),称为雷达视角
单选题A. (0°~90°)~||~(45°~90°)~||~(90°~130°)~||~(130°~175°)
15.气压场:锋面两侧的()
单选题A. 气压梯度连续,等压线过锋线的折角指向低压~||~气压梯度连续,等压线过锋线的折角指向高压~||~气压梯度不连续,等压线过锋线的折角指向低压~||~气压梯度是不连续的,等压线通过锋面有指向高压的折角
16.地理经度和地理纬度的度量范围分别是()
单选题A. 0~90o,0~90o~||~0~180o,0~180o~||~0~90o,0~180o~||~0~180o,0~90o
17.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
18.当船上所有的测风仪器均失灵时,必须根据海面状况进行目力测风,()
单选题A. 风的观测项目可以缺测~||~在离岸较远的海面上,风向与主波向一致,可用罗经测定主波向作为风向~||~在离岸较远的海面上,风向与涌浪来向一致,可用罗经测定涌浪来向作为风向~||~在离岸较远的海面上,风向与风浪来向一致,可用罗经测定风浪来向作为风向
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.______the survivors know more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives ______.
单选题A. Have/couldhavebeensaved~||~Have/couldhavesaved~||~Had/couldhassaved~||~had/couldhavebeensaved
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