单选题
The author seems to say that the invention of the computer is ______.
A、
not so important as that of the steam and petrol engines
B、
at least as important as that of the steam and petrol engines
C、
less important than that of the steam and petrol engines
D、
far more important than that of the steam and petrol engines
【正确答案】
B
【答案解析】
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