单项选择题

By saying that the problems of mechanizing some areas are not only cultural in nature, the author means ______.

A．mechanization is not yet introduced in some areas for economic reasons
B．human and animal labour in some areas are less expensive
C．culture is not a factor in obstacling the introduction of mechanization
D．different kinds of mechanized farming tools are used in different cultures
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单项选择题
The first paragraph uses several examples to convey the ideas that ______.
A．the introduction of machines into agricultural work created rebellions on the part of the farmers
B．the use of internal-combustion engine as a chief power source for the farm produced great influence
C．the mechanization of agricultural work after 1850 gradually robbed many farmers of their work
D．ingenious improvements were made in fanning machines in the 1860s to yield production
单项选择题
It may be concluded from this passage that ______.
A．Islamic artists have had to create architectural decoration with images of flowers or geometric forms
B．history teachers are more objective than artists
C．it is more difficult to study art history than general history
D．people and stories from the Bible were painted on churches and other building in order to popularize the Bible
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