单项选择题
A.craned out
B.rolled out
C.lifted out
D.turned out
单项选择题 In order to increase the wearing resistance, the cylinder liner surfaces are sometimes （）.
单项选择题 In order to ensure the safety of the ship and its equipment during UMS operation, certain essential functions （）.
单项选择题 In order to ensure perfect atomization, the fuel oil （） before injection.