单项选择题
When hitting a solid object such as ship or an airplane,the radar waves are reflected back（）they came.
A.in the way B.the way C.by the way D.through the path
单项选择题 What does SSO stand for regarding ship security?（）
单项选择题 （）provides a selection of commonly used routes with their distances between principal and important positions.
单项选择题 Which of the followings does not belong to main maneuvering facilities?（）
