单项选择题
In reference to accidental oil pollution，the most critical time during bunkering is when （）.
A.you first start to receive fuel B.hoses are being blown down C.final topping off is occurring D.hoses are being disconnected
单项选择题 In case of accidents（）the risk of sinking，all effective measures shall be taken to steer clear of the fairway to avoid（）the traffic.
单项选择题 If you do not wear goggles and helmet，your chances of being（）will be greater.
单项选择题 If the sling bumps（）the beams，serious accidents may follow．
