单选题颜色不变,明暗交替且时间相等的灯质为()。A明暗光B等明暗光C联明暗光D互光
单选题
颜色不变,明暗交替且时间相等的灯质为()。
A
明暗光
B
等明暗光
C
联明暗光
D
互光
参考解析
解析:
暂无解析
相关考题:
单选题The establishment of INMARSAT as an independent organization marked a great step forward for maritime radio communications. What does “marked a great step” mean in the sentence?()ATo run faster than everBTo go forwardCTo march without stoppingDA significant symbol of a great improvement in maritime communication
单选题STCW规则以表格形式对三个责任级别从()方面规定了船员最低适任标准。 a.适任; b.知识、理解和熟悉; c.表明适任的方法; d.评价适任的标准Aa+b+cBa+bCa~dDc+d
单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a ().Aair bottleBair compressorCcrank caseDcombustion chamber
单选题The oil index of main engine should be controlled to prevent it from in heavy weather()Aover heatBover speedCover pressureDover worn
单选题A pilot vessel on pilotage duty shall show identity lights ().Aat any time while underwayBwhile at anchorCwhile alongside a vesselDAll of the above
单选题下列有关新危险物标示法的说法中,何者正确()。A如危险物特别严重,每个标志应尽快设置重复标志B任何重复标志在所有各方面都应该和它配对的标志相同C新危险物标志必须装设雷达应答器来标示D以上都对
单选题英版海图(额定光力射程)上某灯塔的灯质为Fl(2)6s49m22M,测者眼高为9m。则能见度为10nmile时,该灯塔灯光的最大可见距离为()。A19.3nmileB22nmileC20.9nmileD无法确定
单选题根据我国海商法规定,在海上拖航条件下,承拖方与被拖方之间的损害赔偿,以下表述有误的是()。A承拖方与被拖方之间的损害赔偿责任,原则上实行过失责任原则B损失由一方过失造成时,有过失的一方应负赔偿责任C损失由双方过失造成时,双方按各自过失程度比例负赔偿责任D如果难以确定双方过失程度大小的,损失由遭受者自负
单选题涉及法定检验、船级检验的项目,但它是临时发生而需要检验,则可申请()。A展期检验B附加检验C事故检验D适航检验