假定一个线性表为（38，52，25，74，68，16，30，54，90，72），画出按线性表中元素的次序生成的一棵二叉排序树，求出其平均查找长度。

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。

Demand curve（or demand schedule） 需求曲线（或需求表）

Shell排序、快速排序、堆排序的稳定性如何?(23)。若要尽可能的完成对实数数组的排序，且要求排序是稳定的，则应选(24)。若用插入排序算法对n个记录进行排序，最佳情况下，对关键字进行的比较次数为(25)。对于多关键字而言，(26)是一种方便而又高效的文件组织方式。若用冒泡排序对关键字序列{19，16，11，8，5，3}从小到大进行排序，则需要次数为(27)。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。