单项选择题
A.in the midships house
B.at the main deck manifold
C.at the vent header
D.in the pumproom
单项选择题 The major cause of anchor buoy pendant wire failures is（）.
单项选择题 The distance gained in the direction of the original course when you are making a turn is known as（）.
单项选择题 The distance a vessel moves parallel to the original course from the point where the rudder is put over to any point on the turning circle is called the（）.