Almost every new innovation goes through three phases. When initially introducing into the market, the process of adoption is slow. S1.______ The early models are expensive and hard to use, and perhaps even unsafe. The economic impact is relatively great. S2.______ The second phase is the explosive one, where the innovation was S3.______ rapidly adopted by a large number of people. It gets 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 S4.______ economy. During the explosive phase, the whole new industries spring up to produce the new product or innovation, but to service it. S5.______ For example, during the 1920s, there was a dramatic acceleration in auto production, from 1.9 million in 1920 to 4.5 million in 1929. This boom was accompanying by all sorts of other essential activities necessary for S6.______ auto-based nation: Roads had to be built for the cars to run on; refineries and S7.______ oil wells, to provide the gasoline; and garages, to repair it. Historically, the S8.______ same pattern is repeated again and again with innovations. The construction of the electrical system requested an enormous early investment in generation S9.______ and distribution capacity. The introduction of the radio was followed by a buying spree(无节制的狂热行为) by Americans what quickly brought radios into S10.______ almost half of all households by 1930, up from nearly none in 1924. 【S1】
A.______ The B. The C.______ D.______ rapidly E.______ economy. F.______ For G.9 H.5 I.______ auto-based J.______ oil K.______ same L.______ and M.______ almost N. 【S1】