单项选择题

How are tornadoes distinguished from whirlwinds

A．Whirlwinds rotate in a different direction than tornadoes do.
B．Tonadoes travel over land and whirlwinds over water.
C．Tonadoes are larger than whirlwinds.
D．Only tornadoes are funnel - shaped.
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Which of the following is NOT mentioned by the author as a criterion for determining a person's place in a traditional society
A．Family background.
B．Age.
C．Religious belief.
D．Custom.
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According to the passage, who has the greatest degree of control in an administered system
A．Individual
B．Small businesses
C．Major corporations
D．The government
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