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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
it. For example, during the 1920s,
there was dramatic 5.
acceleration in auto production, from
1.9 million in 1920
to 4.5 million in 1929. This boom was
accompanied with all 6.
sorts of other essential activities
necessary for an
auto-based nation: Roads had to been
built for the cars to 7.
run on; refineries and oil wells, to
provide the gasoline;
and garages, to repair it. 8.
Historically, the same pattern is
repeated again and again
with innovations. The construction of
the electrical system
requested an enormous early investment
in generation and 9.
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 almost
half of all households 10.
by 1930, up from nearly none in 1924.
答案：
1. introducing改为
introduced；
2. great 改为
small；
3. was改为is；
4. as 后面的 if
去掉；
5. was 后面加a；
6. with改为by；
7. been改为be；
8. it改为them；
9. requested改为required；
10. what改为that。
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