首页
登录
职称英语
【B1】 [br] 【B3】 [originaltext] Once regarded as an expensive status symbol, th
【B1】 [br] 【B3】 [originaltext] Once regarded as an expensive status symbol, th
游客
2024-03-04
34
管理
问题
【B1】 [br] 【B3】
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
deals
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3505652.html
相关试题推荐
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Phonebookshavewhite,blueandyellowpages.TheWhitePage
随机试题
—Mustwehandinourexercisebookstoday?—Yes,.A、youwillB、youmustC、youdo
设A是m×n矩阵,AX=0是AX=b的导出组,则下列结论正确的是().A.若A
下列关于杜邦分析系统的计算公式中,不正确的有:()A.资产报酬率=销售净利率×
通过教学活动,学生可以“上知天文,下知地理”,这说明学生认识的对象是( )。A
1928年,英国人弗莱明发现,被污染的金黄色葡萄球菌培养基上生长出一种霉菌,进而
在国际局势错综复杂、全球经济增长乏力的背景下,“一带一路”倡议正搭建起促进全球包
严惩破坏生态行为 近日,针对违法毁林、搞违建的黑龙江牡丹江市“曹园
先天性梅毒牙指A.成釉细胞增生突入牙乳头 B.牙齿发育时牙乳头组织向成釉器突起
现场质量检查控制包括()。A.开工前检查 B.工序交接检查 C.隐蔽工程检
传统通信网的主要业务是()业务。A.数据 B.传真 C.话音 D.视频
最新回复
(
0
)