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1.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
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.The approach to the roads and harbor from the______entails no difficulty.
单选题A. eastern~||~easterly~||~eastward~||~Eastwards
4.某轮候潮过浅滩时,需计算所需潮高,若某轮吃水7.5米,要求富裕水深0.5米,浅滩的海图水深4.3米,则通过浅滩所需的潮高为()。
单选题A. 27米~||~113米~||~37米~||~123米
5.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
6.水平气压梯度力与()
单选题A. 空气密度成反比,与气压梯度成正比~||~与空气密度成正比,水平气压梯度成正比~||~与空气密度成反比,水平气压梯度成反比~||~与空气密度成正比,水平气压梯度成反比
7.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
8.The circular steel structure installed around the propeller of a towboat is the______.
单选题A. nozzle~||~shroud~||~strut~||~Hood
9.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
10.()附近,昼夜长短几乎相等,最热月和最冷月热量收支相差不大,气温年较差小。
单选题A. 沙漠~||~草地~||~海洋~||~赤道
11.热带风暴(Tropical Storm,简写())。
单选题A. TD~||~TS~||~STS~||~T
12.My ship sailed______port of Shanghai,bound______Rotterdam.
单选题A. from,for~||~for,on~||~on,at~||~at,from
13.()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
14.在潮汐推算中,如主港3月6日低潮时为2357,低潮时差为+0103,则附港为发生同一低潮应在()
单选题A. 3月6日2254~||~3月7日0100~||~3月7日0003~||~3月6日0100
15.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
16.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
17.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
18.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
19.罗北偏离真北的角度称为()
单选题A. 磁差~||~自差~||~罗经差~||~陀罗差
20.船位报告是()
单选题A. 一天三次的船位例行报告~||~为保持报告系统有效而进行的在必要时刻做出的报告~||~中午船位~||~船舶转向后作的船位报告
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