土壤酸碱度中，以PH值在（）范围的土壤为中性土壤。

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。

下列哪种肥料元素在土壤中移动性强。（）

下列肥料中属于生理碱性肥料的是（）

下列肥料中，（）是生理中性肥料。

下列肥料属于生理中性肥料的是：（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。