单项选择题

Why does the author mention genetic engineering and computer science

A．To compare them with the new materials.
B．To show the significance of the new materials on the future world.
C．To compare the new materials to them.
D．To explain his viewpoint.

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热门试题

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

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