单项选择题
Grinding to eliminate shallow surface defects should be done（）.
A.parallel to the longitudinal direction of the chain B.perpendicular to the direction of the anchor chain C.diagonally across the link of the anchor chain D.around the circumference of the chain link
单项选择题 Fuel oil tank vents are fitted with a screen which will stop（）.
单项选择题 Freeboard is measured from the upper edge of the（）.
单项选择题 Forecastle deck is located in the ship’s（）.
