单项选择题

The writer considers that the Bronze Age succeeded the Stone Age because

A．there was a scarcity of wood and other building materials
B．bronze was less expensive than stone
C．stone was no longer available
D．more bronze than stone came into use

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热门试题

单项选择题

Decentralization is best defined as ______.

A．movement from the central city to nu'al areas
B．movement from the central city to the suburbs
C．disorderly expansion of the central city
D．shrinking of metropolitan

单项选择题

One aspect of the recent population trend is the _________.

A．development of complexes of cities
B．increasingly great distance between cities
C．transformation of cities into suburbs
D．growth of many small towns