Almost every new innovation goes through three phases. Wheninitially introducing into the

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】