煤炭工业技术政策规定，采区采出率：厚煤层≥（）

煤炭工业技术政策规定，采区采出率：薄煤层≥（）

采区内的上、下山和平巷的高度不得低于（）。薄煤层内的不得低于（）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

《关于合理开采煤炭资源提高回采率的若干规定（试行）》中规定，各类煤层采区回采率：（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

国家对采煤工作面采出率的规定是：薄煤层不低于（），中厚煤层不低于（），厚煤层不低于（）。