It took（）years for world population to grow from 1 billion to 3 billion.
A: 100
B: 115
C: 130
D: 145
A: 100
B: 115
C: 130
D: 145
举一反三
- How long did it take for the world's population to increase from 2 billion to 3 billion A: 304 years. B: 123 years. C: 33 years. D: 14 years.
- It is expected that the world's population will reach ______ by the end of the century. A) 2 billion people C) 80 percent of all people B) 4.4 billion people D) 6.4 billion people A: It is expected that the world's population will reach ______ by the end of the century. B: 2 billion people C: 4.4 billion people D: 80 percent of all people E: 6.4 billion people
- The population of the world today is about______ . A: 400 million B: 4 billion C: 400 million D: 40 billion
- The world’s population around 6.7 billion, 20%of whichis Chinese.
- Suppose the only revenue taken in by the government is in the form of income tax, and the tax rate is 10 percent. If aggregate income is $800 billion, and government outlays are $100 billion then the government budget has A: a deficit of $20 billion. B: a surplus of $20 billion. C: neither a surplus nor a deficit. D: a deficit of $80 billion.