汉堡港始建于1189年，如今已发展成为世界上最大的（），在自由港的中心有世界上最大的仓储城，面积达50万平米。

一般最大静摩擦系数比动摩擦系数小 ( )

世界上种植面积最大种植量最广泛的粮食作物是： 小麦

人口学上，一般把“人口负担系数”小于50%的时期称为人口红利期。人口负担系数是指人口中（）与（）之比。

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.

全国高校最大、单体建筑面积达（）万多平方米的图书馆。

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。