各类生态系统可以合并划分为（），整个生物圈则构成地球上最大规模的生态系统。

湿地是地球上独特的生态系统，被誉为（）

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。

亚马孙雨林是功能强大的生态系统，被称为“地球之肺”但雨林生态又是非常脆弱的据此回答：雨林生态脆弱的表现不包括（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。