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  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2025-07-29  11
问题 Which of the following gives a general idea of how the noise killing system works? [br] Besides its main use the noise killing system can______.
选项 A、make a car lighter
B、make a car quieter
C、reduce the cost of a silencer
D、improve the performance of a silencer
答案 A
解析 通过文章第三段：Another good thing about  the use of noise-killing systems is that it saves the need for a silencer；this not only reduces the weight of a car...可知，应用了这项设备，还可以降低汽车的重量。所以正确的答案为A。
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