下列专业中，二级建造师不能执业的专业是（ ）。

电子商务员和助理电子商务师的考试特点包括（）。

电子商务员和助理电子商务师的培训教案编写原则包括（）。

预防计算机病毒的最好的方法是（）。

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.

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。

物流成本二级账户（或辅助账户）核算形式，是指在不影响当前财务会计核算流程的前提下，通过在相应的成本费用账户下设置物流成本二级账户，进行独立的物流成本二级核算统计。