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1.天气是指某一特定区域，（）。
单选题A. 气象要素的一年平均特征(其中包括极值)~||~在较长时间内各种气象要素的综合表现~||~气象要素的多年平均特征(其中包括极值)~||~在较短时间内各种气象要素的综合表现
2.观测时间一律使用世界时(UTC)，每天按（）观测四次。
单选题A. 00Z06Z12Z18Z~||~03Z09Z15Z21Z~||~00Z12Z~||~08Z14Z20Z02Z
3.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
4.（）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
5.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
6.象灯塔、教堂尖顶及锥形浮标等这类锥形目标的反射性能很差，只有当雷达波与其母线（），其反射性能才和圆柱形目标相同
单选题A. 交叉时~||~平行~||~互相成180°角时~||~垂直时
7.罗北线与磁北线之间的角度 称为（）
单选题A. 磁差~||~自差~||~罗经差~||~陀罗差
8.由于冷空气比暖空气重，随着地球自转，这个过渡带(交界面)，向冷气团（）
单选题A. 水平~||~垂直~||~螺旋~||~倾斜
9.A correction for augmentation is included in the Nautical Almanac corrections for ______.
单选题A. theSun~||~theMoon~||~Venus~||~Noneoftheabove
10.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
11.（）为南海季风转换月份，风向不稳定，海流处于转换之中，比较零乱。
单选题A. 1月和7月~||~3月和9月~||~4月和10月~||~6月和12月
12.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
13.The circular steel structure installed around the propeller of a towboat is the______．
单选题A. nozzle~||~shroud~||~strut~||~Hood
14.气压观测应在（）
单选题A. 正点前15min进行~||~接近正点进行~||~正点前10min进行~||~正点前30min进行
15.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
16.The bow thruster generally is ineffective at ______.
单选题A. over3knotsheadway~||~atanyspeedastern~||~atanyspeedahead~||~over1knotsternway
17.For working details______Admiralty list of Radio Signal
单选题A. refer~||~see~||~Look~||~watch
18.In beaufort wind scale，sea state with moderate waves，taking longer form，many whitecaps and some spray，is named as______．
单选题A. Strongbreeze~||~Freshbreeze~||~Stronggale~||~Gale
19.热带气旋与温带气旋相比较，通常从中心向外围的大风变化为（）
单选题A. 两者均迅速减小~||~前者迅速减小，后者缓慢减小~||~前者缓慢减小，后者迅速减小~||~两者均缓慢减小
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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