单项选择题
Take down ()(G旗).
A.Flag“H” B.Flag“G” C.Flag“Q” D.Flag
单项选择题 A ()(救生圈) should be located on the gangway.
单项选择题 The gangway is going to hit the ()(系缆桩) on the wharf.
单项选择题 Spread a safety net under the () (舷梯).