问题
单项选择题
对于通信行业来说，在一定的范围内，随着规模的扩大，单位成本呈单调递减，也就是消费者越多、越密集，设施的公用性就()。
A.越低
B.越高
C.发展越迅速
D.发展越缓慢
答案
参考答案：B
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对于通信行业来说，在一定的范围内，随着规模的扩大，单位成本呈单调递减，也就是消费者越多、越密集，设施的公用性就()。
A.越低
B.越高
C.发展越迅速
D.发展越缓慢
参考答案：B
小题3: used cards with holes, it could produce an answer quicker than any person. Later, Alan Turning wrote a book about how a computer could be made 小题4: work as a “universal machine”. From then on, the computer grew rapidly both in size and in brainpower. By the 1940s, it had grown as large as a room and this reality worried the designers. 小题5: , with its memory 小题6: (improve), the computer was ma
de smaller. First, the memory was stored in tubes, then on transistors and later on very small chips. As a result, the shape of the computer 小题7: (total) changed from a large machine to a PC and then a laptop. Connected by 小题8: network, the computer was able to share its knowledge 小题9: others through the World Wide Web. Since the 1970s many new applications of the computer 小题10: (find) in communication, finance, trade and many other areas. The computer has become a devoted friend and helper of the human race.
