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  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  60
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] Emergency operators can identify the. precise location of call-phone callers through GPS systems with the use of ______.
选项
答案 “E911”/“enhanced 911”。
解析 根据题干中的信息词precise location和GPS systems定位到第三个小标题下的第二段，可知E911使得处理紧急事故者可以通过全球定位系统确定打手机者的准确位置，由此可得答案。
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