电子商务企业提高配送经济效益的主要途径有哪些？

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。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

礼仪是自愿的礼貌行为活动，不是必须严格遵守的礼貌行为规范和法则。（）

参加会议人员应避免哪些不礼貌行为？

礼貌是人与人之间接触交往中相互的行为，它包括以下哪些（）？

下面哪些不是礼貌行为（）。

高速公路线形设计时，平、纵断面组合时应注意避免的情况有哪些？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。