A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

Chance骨折

关于胸腰椎Chance骨折，叙述错误的是（）

关于胸腰椎Chance骨折叙述错误的是（）

胸腰椎Chance骨折是指（）

Chance骨折是指胸腰椎（）

[复合型非选择题]男性，21岁。在施工中不慎坠楼，腰剧痛，双下肢感觉运动正常，考虑腰椎损伤。经X线平片和CT检查，诊断为腰椎体单纯性楔形压缩骨折，根据Danis三柱理论，该患者腰椎体损伤在（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。