当事人在合同中为一方或各方约定的解除权产生条件具备，取得解除权的当事人行使解除权解除合同的行为，称之为（）。

合同当事人有权单方行使合同解除权的情形有（）。

合同当事人有权单方行使合同解除权的情形有（）。

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.

试述我国合同法中的法定解除权。（提示：产生解除权的法定事由；法定解除权的性质；法定解除权的行使；合同解除后的法律效果）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

建设工程施工合同约定，施工企业未按节点工期完成约定进度的，建设单位可以解除合同，解除合同此约定属于合同的（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。