单选题某轮船速12kn,顶风顺流航行,流速2kn,风使船减速1kn,则1h后船舶实际航程为()。A11nmileB12nmileC13nmileD14nmile
单选题
某轮船速12kn,顶风顺流航行,流速2kn,风使船减速1kn,则1h后船舶实际航程为()。
A
11nmile
B
12nmile
C
13nmile
D
14nmile
参考解析
解析:
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