首页
登录
职称英语
[originaltext] American engineers Paul Flores and Jim Gibbson are studying M
[originaltext] American engineers Paul Flores and Jim Gibbson are studying M
游客
2024-03-01
74
管理
问题
American engineers Paul Flores and Jim Gibbson are studying Mexico’s earthquake warning system. They hope such a system could be implemented in California where earthquakes are quite common even if it could give only a few seconds of warning before an earthquake.
"With just a couple of seconds’ warning, teachers, for example, can get the children under the desks before things on the shelves start failing onto their heads, "Flores said, "That’s what early warning could do in the States."
Flores and Gibbson have a one-year, $ 50,000grant from the National Science Foundation to study Mexico’s early warning system. The system is made up of 12 earthquake monitors buried 305 kilometers south of Mexico City along the coast.
When an earthquake measuring 3.5 or greater on the Richter scale strikes, the monitors detect the shack waves and instantly send out an electronic signal to computers in Mexico City. The computers process the information and continue to pass it to radio stations and public speakers that sound earthquake alarms. City residents can then be warned to get to safe places. Since the electronic signal travels faster than the quake’s shock waves, the city can receive a warning of about one minute before the quake strikes.
But a similar system in California would not be able to give that long a warning because earthquake centers are much closer to population centers.
Gibbson noted that problems do exist with Mexico’s system, including false alarms issued by small earthquakes. "But people shouldn’t lose confidence in the warning system," Gibbson said. And according to an earthquake expert in Mexico City, there are more benefits than problems. "We still have a lot to learn, but the more we learn, the better it will be for people in California to be able to use a system one day based on our actual experience," the expert said.
选项
A、Because the state of California is much larger.
B、Because the electronic signal travels faster in Mexico.
C、Because the quake’s shock waves are stronger in California.
D、Because quake centers are much closer to population centers in California.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3497264.html
相关试题推荐
[originaltext]Ifyoujudgebythenumberofpeoplewhogotoseethegames
[originaltext]Ifyoujudgebythenumberofpeoplewhogotoseethegames
[originaltext]W:Hi,youlookalittlelost.Doyouneedsomehelp?M:No,than
[originaltext]W:Hi,youlookalittlelost.Doyouneedsomehelp?M:No,than
[originaltext]W:Hi,youlookalittlelost.Doyouneedsomehelp?M:No,than
[originaltext]PamelaRoyalandherpartnerEdithClarkaretheownersofth
[originaltext]Theyearis2501,andtheEarthisdesperatelyshortoffuel.
[originaltext]W:Excuseme,sir.I’mnewhere.Couldyoushowmehowtomakea
[originaltext]W:Excuseme,sir.I’mnewhere.Couldyoushowmehowtomakea
[originaltext]M:Ithinkyou’dbetterfindanotherpartner.Ilovetabletennis
随机试题
BossesSay"Yes"toHomeWo
Ifyou’vekeptupwiththenewslately,you’veprobablyhearddirewarnings
易燃易爆危险品库房与在建工程的防火间距不应小于()mA.10 B.15 C
A
以下关于计算机系统中高速缓存(Cache)的说法中,正确的是(9)A.Cache
健康管理的目的是()。A.以最小投入获取最大的健康效益B.有效地利用有限的资源来
A.中国药学会B.中国非处方药物协会C.中国执业药师协会D.中国医药教育协会E.
妊娠妇女血清中HCG浓度达到高峰的时间是A:10~15天B:20~30天C:
某县医院对其配制的医院制剂A,可以采取的服务措施是A.将A销售给药品经营企业
建设工程项目风险可分为组织风险、经济与管理风险、工程环境和技术风险,下列风险因素
最新回复
(
0
)