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Instead, there is a new business cycle, tied to the health of the high-tech sector. Riding a wave of technological optimism, the computer, software, and communications industries have grown at a pace far exceeding the rest of the economy over the past three years, helping to _____the expansion.

单选题
2018-08-03 03:01:09
0676
 A.extent
 B.expand
 C.extend
 D.spread
参考答案:……
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