单选题
Researchers built the calculating difference engine according to Babbage's design in order to show that______.
A、
Babbage's intelligence was far ahead of his fellow-men
B、
Babbage's idea was reasonable both theoretically and practically
C、
Babbage's dream could only be realized in the 20th century
D、
Babbage's design was actually imperfect
【正确答案】
B
【答案解析】
这是一道细节题。依据第二段首句可知答案为B。
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