This passage is mainly about      .(  )

• A、the difference between national income and GNP
• B、the difference between national income and personal income
• C、the concept of income
• D、the difference between disposable income and nondisposable income

A. negative

B. criticize

C. spiritually

D. shameful

E. affection

F. discovered

G. appreciate

H. confused

I. fit

J. admit

K. used

L. help

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