大学英语六级考试改错冲刺模拟题 3 大学英语六级考试改错冲刺模拟题 3

大学英语六级考试改错冲刺模拟题3

Almost every new innovation goes through three phases.

　　When initially introducing into the market, the process 1.

　　of adoption is slow. The early models are expensive and

　　hard to use, and perhaps even unsafe. The economic

　　impact is relatively great. 2.

　　The second phase is the explosive one, where the innovation

　　was rapidly adopted by a large number of people. It gets 3.

　　cheaper and easier to use and becomes something familiar.

　　And then in the third stage, diffusion of the innovation

　　slows down again, as if it permeates out across the economy. 4.

　　During the explosive phase, whole new industries spring

　　up to produce the new product or innovation, and to service