单项选择题
The meaning of ebb tide is that（）.
A.tide is falling from high water to low water B.tide is rising from low water to high water C.tide is reaching to a highest level D.tide is reaching to a lowest level
单项选择题 The pilot station（）close west of the end of the breakwater.
单项选择题 The portable radio apparatus means（）.
单项选择题 The quays are not connected（）the railway system.
