单项选择题

It can be inferred that ceramics________.

A．has advantages over plastics
B．will dominate future life of human beings
C．will be endowed with more practical uses
D．has gotten rid of the slightest imperfection of brittleness
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单项选择题
Why is transition so difficult
A．Because transition requires money and time.
B．Because many manufacturers are unwilling to change their equipment.
C．Because research on new materials is very difficult.
D．Because it takes 10 years.
单项选择题
According to the author, material science________.
A．was not attractive enough for its limited practice
B．was too dull to attract people' s attentions
C．was not well shaped to arouse people's interests
D．gave birth to new materials which could generate electric power
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