女：你怎么买了这么多油？男：超市搞活动，买一送一。女：那是挺便宜的，这两桶够咱俩用一年了。男：没关系，慢慢用吧。问：男的为什么买那么多油？

甲商场采用买一送一方式销售某品牌牙刷和牙膏，买一只市场价20元的牙膏送市场价5元的牙刷一只。则确认销售收入时牙膏的销售收入为 ( )

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。

与传统营销的定价策略不同，网络营销定价策略实现了从成本定价向( )的转变。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。