2. 外语
  3. Almost every new innovation goes【C1】______three phases.【C2】______initially【C3】______into the market, the process of【C4】______is

Almost every new innovation goes【C1】______three phases.【C2】______initially【C3】______into the market, the process of【C4】______is

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问题     Almost every new innovation goes【C1】______three phases.【C2】______initially【C3】______into the market, the process of【C4】______is slow. The early models are expensive and hard to use, and perhaps even unsafe. The economic【C5】______is relatively small. The second phase is the explosive one,【C6】______the innovation is rapidly adopted by a large number of people. It gets cheaper and easier to use and becomes something familiar. And then in the third【C7】______,【C8】______of the innovation【C9】______again,【C10】______it permeates out across the economy.
    During the explosive phase, whole new industries spring up to produce the new product or innovation, and to【C11】______it. For example, during the 1920s, there was【C12】______dramatic acceleration in auto production, from 1.9 million in 1920 to 4.5 million in 1929. This【C13】______was accompanied【C14】______all sorts of other essential activities necessary for an auto-based nation: Roads had to be built for the cars to【C15】______; refineries and oil wells, to provide the gasoline; and garages, to repair【C16】______. Historically, the same【C17】______is repeated again and again with innovations. The construction of the electrical system【C18】______an enormous early investment in generation and distribution【C19】______. The introduction of the radio was followed by a buying spree by Americans that quickly brought radios into almost half of all【C20】______by 1930, up from nearly none in 1924.
【C2】
选项 A、When
B、As
C、While
D、Since
答案A
解析 逻辑关系题原文意为“当产品最初进入市场时”，故此处为时间状语，而while引导的从句通常表示一段时间，从句中宜用持续性动词作谓语，同时如果主从句之间表示转折或对比关系时也多用while；as则表示一个人的两个动作交替进行或同时完成，如果表示从句的动作在主句的动作“之前”或“之后”发生时，多用when(=after)，不用as或while。此外，when还含有“at that moment”的意思(=andthen)，引导的句子不能放在句首，也不能用as，while来替换。此处隐含“之后”的意思，故选A。
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