运用生产关系必须适合生产力性质的规律，说明我国社会主义初级阶段实行以公有制为主体、多种所有制经济共同发展的基本经济制度的正确性。

我国经济普查每5年进行一次，2018年开展的经济普查是我国第（　　）次经济普查。[2018年初级真题]

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

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。

在社会主义初级阶段，公有制经济和非公有制经济（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。