There is no jet traffic at Washington’s National Airport from 11pm to 7am because ______. The author of the passage in concerne

admin2009-06-15  77

问题 There is no jet traffic at Washington’s National Airport from 11pm to 7am because ______.
The author of the passage in concerned primarily with ______.

选项 A、the effects of noise on the quality of life
B、the role of air traffic restrictions
C、the production of quieter engines
D、the economic aspects of noise reduction

答案D

解析
转载请注明原文地址:https://jikaoti.com/ti/2E8sFFFM
0

最新回复(0)