题目内容
（请给出正确答案）
[主观题]
The example of the early models of high-speed railroad cars is used to ______.A．weaken the
The example of the early models of high-speed railroad cars is used to ______.
A．weaken the point that math is a necessary part of the study of design
B．support the idea that errors in modern 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
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