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1.赤道气团(Equatorialairmass)：大致位于南北纬10°以内的洋面。具有（）的天气特征
单选题A. 干热稳定少有降雨天气~||~高温潮湿层结不稳定多雷阵雨~||~湿热稳定多狂风暴雨天气~||~高温潮湿稳定无大风天气
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.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
4.Radar is used not only to look______，but also to measure their distances away from you．
单选题A. atobscuredobjects~||~forwardsubmergedtargets~||~upexposedtargets~||~forunseenobjects
5.已知磁差Var=2°W，罗经差1°W，磁航向000°，则真航向为（）
单选题A. 357°~||~358°~||~359°~||~003°
6.阵性降水历时短，强度变化很快，骤降骤止，天空时明时暗，降水来自浓积云和（），并常伴有阵性大风等特点。
单选题A. 积雨云~||~淡积云~||~雨层云~||~层云
7.海面能见度为1km，那么警报为（）。
单选题A. 大风警报~||~一般警报~||~浓雾警报~||~风暴警报
8.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
9.远离或尚未影响到预报责任区时，根据需要可以发布“消息”，预计未来（）内将影响本责任区的沿海地区或登临时发布警报
单选题A. 24h~||~48h~||~72h~||~36h
10.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
11.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
12.______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
13.“东风送湿，西风送干”的交换方式属于（）
单选题A. 平流~||~辐射~||~湍流~||~对流
14.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
15.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
16.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
17.STS--（）(Severe Tropical Storm)，风力10～11级(风速48～63kn)
单选题A. 热带风暴~||~风暴警报~||~强热带风暴~||~大风警报
18.12HOURS 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
19.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
20.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
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