99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項(xiàng)選擇題

A loaded hopper barge with independent tanks has a placard,with alternating red and white quadrants,on each side and end. Which statement concerning this barge is TRUE?()

A.The cargo will spontaneously ignite if released to the atmosphere
B.You must operate this barge as a lead barge
C.The barge should be spotted as far away from the towboat as possible
D.The barge must be in a protected position within the tow

微信掃碼免費(fèi)搜題