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 （）.

数量折扣视为机会成本时是指放弃可获得的最大订购量折扣而形成的机会成本，等于（）。

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）

庆华公司于2015年9月销售某商品，标价1600元/件（不含税），适用的增值税率为17%。一次购买20件以上给予10%的商业折扣，一次购买100件以上给予20%的折扣优惠。允许的付款时间为20天。请在如下情况下编制相关会计分录。 2015年9月18日，客户B一次购买100件。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。