单项选择题
Turn on the pilot light ,“white” up and “ red” down .()
A.打开引航灯,上红下白。 B.打开引航灯,上白下红。 C.把引航灯从白色变成红色。 D.把引航灯从红色变成白色。
单项选择题 Do we need to put lights on at the pilot ladder position?()
单项选择题 Is the ladder all right at this height?()
单项选择题 Mind your head .I am dropping the light line now.()