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【单选题】
有一个职工的工资关系，包括的属性有（职工号，职工姓名，岗位工资，薪级工资，岗位津贴，预扣养老款，合计），其中，合计=岗位工资+薪级工资+岗位津贴-预扣养老款，现在需要创建触发器根据录入的前面几项值自动计算合计，那么此触发器的触发时序是哪种？（ ）A.
后触发
B.
前触发
C.
替代触发
D.
前触发或后触发
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皮皮学刷刷变学霸
举一反三
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【单选题】Which is the longest river in America?
A.
Hudson River
B.
Columbia Rive
C.
St. Lawrence River
D.
The Mississippi River
【简答题】A．The effects of the flood. B．The prices of fruits and vegetables. C．The cause of the flood. D．Floods of the past twenty years.
【单选题】Which is the longest river in America?
A.
Hudson River
B.
Columbia River
C.
St. Lawrence River
D.
The Mississippi River
【单选题】Which is the longest river in the Great Britain?
A.
Lough Neagh
B.
River Thames
C.
River Clyde
D.
River Severn
【简答题】A．The cause of the flood. B．The effects of the flood. C．The heroic fight against a flood. D．Floods of the past twenty years.
【简答题】《民法通则》第4条规定，民事活动应当遵循自愿、公平、等价有偿、______________的原则。
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