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The First Navigational Lights In the New World the first navigational lights were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on little Brewster Island at the entrance to Boston Harbor. Paid for and maintained by "light dues" levied on ships, the original beacon was blown up in 1776. By then there were only a dozen of so true lighthouses in the colonies. Little over a century later, there were 700 lighthouses. The first eight lighthouses erected on the west coast in the 1850’s featured the same basic new England design: a Cape Cod dwelling with the tower rising from the center or standing close by. In New England and elsewhere, though, lighthouses reflected a variety of architectural styles. Since most station A. The first lantern wicks were developed there. B. It was tile headquarters of the United States Lighthouse Board. C. Many of the tallest lighthouses were built there. D. The first lighthouse in North America was built there. [单选题]女,36岁。不慎跌入热水池中烫伤双下肢(不包括臀部)。按新九分法估算,其烧伤面积是
A.43% B.41% C.40% D.39% E.42% [单选题]单选题:ATS系统中每一报警的优先级在报警队列中以不同的颜色显示,每种颜色代表不同级别报警时会发出提示音,下列颜色显示时会发出持续报警提示音的是( )。
A.黄色 B.青色 C.白色 D.橙色 [单选题]晃车时刻列车运行速度为160km及以上时,列车调度员应向后续首列发布限速120km/h的调度命令,限速位置应该按司机汇报的晃车地点前后各( )确定。
A.500m B.1km C.2km D.3km [单选题]无缝线路地段，备用轨枕数规定是( )。
A.2根/km B.4根/km C.6根/km D.8根/km [判断题]听众的态度越极端，越容易接受不同的观点。
[判断题]存储器中的信息不会丢失。
A.正确 B.错误 [判断题]交通事故处置过程中，火灾扑灭后警戒及安全岗便可予以撤回。（）
A.正确 B.错误 我来回答: 提交
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