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单项选择题
In the passage, the author is primarily concerned with ______.
A．identifying the kinds of thinking that are used by technologists
B．stressing the importance of nonverbal thinking in engineering design
C．proposing a new role for nonscientific thinking in the development of technology
D．criticizing engineering schools for emphasizing science in engineering curricula
单项选择题
The author refers to the ocean bottom as a frontier in the first sentence because it ______.
A．is not a popular area for scientific research
B．contains a wide variety of life forms
C．attracts courageous explorers
D．is an unknown territory
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