2. 职称英语
  3. A bird flu, a massive earthquake, a monster storm and a terrorist attack are all

A bird flu, a massive earthquake, a monster storm and a terrorist attack are all

游客2023-08-31  30
问题 A bird flu, a massive earthquake, a monster storm and a terrorist attack are all threats to major cities in the U.S. [br] Incompatible communications is a country-wide problem in the U.S. because of the ______ which should be converted or replaced.
选项
答案 decades-old radio systems。
解析 根据题干中的信息词incompatible communications和converted定位到第三个小标题下的第一段，可知通信不畅是全国(美国)性的问题，而修整或更换已使用数十年的无线电系统既费时又费钱，由此推断，通信不畅的原因是无线电系统年久失修，因此可得答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2973232.html
相关试题推荐
随机试题
最新回复(0)