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（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

1936年（），张学良、杨虎城实施兵谏，扣留蒋介石，囚禁从南京来的几十名国民党军政要员，史称西安事变。

在民族危亡关头，张学良.杨虎城两将军不顾个人安危，毅然发动西安事变，立下了不朽功勋。下列选项中，对他们评价准确的是（）

张学良将军曾被软禁在（）。

张学良将军是张作霖的第几个儿子（）。

下列（）座寺院曾软禁过张学良将军。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。