In the passage, the author is primarily concerned with______. The example of the early models of high-speed railroad cars is us

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问题 In the passage, the author is primarily concerned with______.
The example of the early models of high-speed railroad cars is used to______.

选项 A、weaken the point that math is a necessary part of the study of design
B、support the idea that errors in modem engineering systems are likely to increase
C、illustrate the topic that courses in design are the most effective cost-reducing means
D、exemplify the thesis that inadequate attention to nonscientific design may result in poor design

答案D

解析 结构题。以高速公路上的小汽车为例主要是为了说明例句前面的句子,也就是最后一段第一句话。只有D项和它内容相符。
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