Answer the following questions：
Is the tip included in the price of the meal in most American restaurants?
How is a person's income tax charged?
What is the original meaning of "salt"?
Who gives Academy Awards?
What do taxes on income include?
What do taxes on capital include?
Who nominate the candidates of Academy Awards?
Where does a government receive its revenue？
What is the difference between wage and salary?
Who can be the candidates of Nobel Prize winners?