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钓鱼岛(The Diaoyu Islands)自古就是我国固有领土,它的位置距温州市约356km、福州市约385 km、基隆市约190 km。若我国某海监船为维护我国对钓鱼岛主权,从温州出发去钓鱼岛巡航,到达钓鱼岛时航行了480 km。则下列说法中不正确的是(    )
A.该海监船位移的大小是480 km,路程356 km
B.该海监船位移的大小是356 km,路程480 km
C.该海监船在海上航行时,确定其位置时可以将该海监船看成质点
D.若知道此次航行时间可求出此次航行的近似平均速度
A

试题分析:根据位移和路程的概念可知,该海监船位移的大小是356 km,路程480 km;该海监船在海上航行时,确定其位置时可以将该海监船看成质点;若知道此次航行时间可根据求出此次航行的近似平均速度,答案选A。
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