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Which of the following gives a general idea of how the noise killing system work
Which of the following gives a general idea of how the noise killing system work
游客
2025-07-29
1
管理
问题
Which of the following gives a general idea of how the noise killing system works? [br] The noise killing system is not yet popular mainly because______.
选项
A、it is still being tried out
B、drivers still have their doubts
C、it increases the cost of car production
D、carmakers are not sure if it is necessary
答案
C
解析
从文章最后一段最后一句，But the car makers haven’t decided if they will carry it into production because it would add several hundred dollars to the cost of their cars可知，因为费用太高，所以没有打算投入生产。
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