Which of the following gives a general idea of how the noise killing system work

游客2025-07-29 8

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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Which of the following gives a general idea of how the noise killing system work

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Whichofthefollowinggivesageneralideaofhowthenoisekillingsystemwork

Withwhichofthefollowingtopicsisthepassageprimarilyconcerned?[br]Whic

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