首页
登录
职称英语
【B1】 [br] 【B7】 [originaltext] Once regarded as an expensive status symbol, th
【B1】 [br] 【B7】 [originaltext] Once regarded as an expensive status symbol, th
游客
2024-03-04
74
管理
问题
【B1】 [br] 【B7】
Once regarded as an expensive status symbol, the cellular telephone has become a popular crime-fighting and safety tool for drivers. Every month, people with car phones make 600,000 calls to emergency numbers, reporting not only drunken driving but also such crimes as drug deals, burglaries and car jackings. "They are our eyes and ears," says Dennis Martin, executive director of the National Association of Chiefs of Police.
Some car phones are installed permanently, drawing power from the vehicle’s battery. Others are portable, powered by the car’s cigarette lighter or by an internal, rechargeable battery. But all operate the same way. Dialing a cellular phone sends a radio signal to the telephone company tower covering that geographic area, or cell site. When a driver begins moving out of one cell site, a telephone company computer senses the weakening signal and automatically passes the call to the next tower. With about 13,000 towers in operation, 97 percent of the population lies within range of cellular service. When car phones first appeared, some police officials worried that drivers using them would not pay attention to the road and would get in accidents. In fact, the phones are making the roads safer, particularly against the danger of drunken drivers. And police are now cooperating with initiatives involving cellular phones.
选项
答案
internal
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3505656.html
相关试题推荐
[originaltext]Goodmorning,class.Mytopictodayishowtofeedahungryw
[originaltext]Goodmorning,class.Mytopictodayishowtofeedahungryw
[originaltext]Emotionsareanessentialandinseparablepartofourconscio
[originaltext]WhileithaslongbeenapracticeinAsiancountries,manype
[originaltext]WhileithaslongbeenapracticeinAsiancountries,manype
[originaltext]WhileithaslongbeenapracticeinAsiancountries,manype
[originaltext]Thesaying"blindasabat"simplyisn’tcorrect.Thetruthi
[originaltext]Thesaying"blindasabat"simplyisn’tcorrect.Thetruthi
[originaltext]M:WithmeinthestudiotodayisMs.JaneLogan,authorofanew
[originaltext]M:WithmeinthestudiotodayisMs.JaneLogan,authorofanew
随机试题
Mostofushaveseenadogstaringat,sometimessnarlingat,andapproachin
Beforewecandecidewheretobuyourmaterials,werequireasmuchinformation
女,18岁。长跑后呼吸困难来诊。听诊肺动脉瓣区3/6级收缩期吹风样杂音,伴吸气和
A.毛燮均分类第Ⅰ类错 B.毛燮均分类第Ⅱ类错 C.毛燮均分类第Ⅲ类错 D
某单位工程——民用住宅,由基础工程、主体工程、装饰工程三个分部工程组成,其流水节
单一法人客户的信用分析中,下列关于现金流量分析的说法错误的有()。A.现金
案例三: 一般资料:求助者,男性,33岁,大学教师。 案例介绍:求助者博士毕
A.IF-1、IF-2、IF-3 B.IGF C.EF-T D.EGF
(2018年真题)()是组织进行人员招募和甄选工作的重要依据。A.人力资源管理
患者女,60岁。在精神紧张、情绪激动后感觉头晕、头痛、眼花、耳鸣,血压升高,休息
最新回复
(
0
)