带头结点的单向链表为空的判断条件是（）（设头指针为head）。

带头结点的链表为空的判断条件是（）（设头指针为head）。

判断带头结点的单链表L为空的条件（）

带头结点的循环单链表head为空的判断条件是（）

判断一个顺序队列（最多元素为m）为空的条件是（）。

万方数据库使用布尔逻辑算符anD./or/not.其中A.anD.B表示（）。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。