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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在砖砌体施工工艺中，立皮数杆的紧前工序是（）

在砖砌体施工中，皮数杆宜设置在下列部位（）。

关于砖砌体施工工艺中立皮数杆表述不正确的是（）。

在砖砌体转角处、交接处应设置皮数杆，皮数杆上标明砖皮数、灰缝厚度以及竖向构造的变化部位。皮数杆间距不应大于（）m。

砖砌体工程中，在设置的皮数杆上应标明（　　）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。