2. 职称英语
  3. 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2025-07-31  19
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 carmakers haven’t decided if they will carry it into production because it would add several hundred dollars to the cost of their cars．得知。
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