单项选择题
The series of valves used to control the return flow in well control operations is called the（）.
A.valve assembly B.standpipe manifold C.accumulator manifold D.choke manifold
单项选择题 The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
单项选择题 The purpose of a bilge well is to（）.
单项选择题 The portable radio apparatus means（）.
