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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列与细胞免疫密切相关的细胞是（）

下列哪种细胞与细胞免疫密切相关

下列与免疫功能密切相关的蛋白质是（）

下列脑叶与人类的记忆密切相关的是（）。

与人类肿瘤密切相关的病毒除（）。

与人类鼻咽癌密切相关的病毒是

下列脑叶与人类的记忆密切相关的是( )。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。