单项选择题

According to this passage, various types of packaging come into existence to ______.

A．meet the needs of consumers
B．suit all kinds of products
C．enhance the market position of products
D．introduce new products
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单项选择题
A spear or a robot has the quality of technology only when it ______.
A．is used both as a cultural and a physical object
B．serves different purposes equally well
C．is utilized by man
D．can be of use to both man and animal
单项选择题
According to the author, the introduction of the computer is a revolution mainly because ______.
A．the computer has revolutionized the workings of the human mind
B．the computer can do the tasks that could only be done by people before
C．it has helped to switch to an information technology
D．it has a great potential impact on society
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