首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A cheap printed sensor (传感器) could transmit wildfire warnings. Wildfires have recently destroyed the forests across the world, a
A cheap printed sensor (传感器) could transmit wildfire warnings. Wildfires have recently destroyed the forests across the world, a
admin
2022-07-24
81
问题
A cheap printed sensor (传感器) could transmit wildfire warnings. Wildfires have recently destroyed the forests across the world, and their gravity is increasing. Hoping to reduce harm, researchers led by Yapei Wang, a Chinese chemist of Renmin University, say they have developed an inexpensive sensor to detect (监测) such fires earlier with less effort.
Current detection methods rely heavily on human watchfulness, which can delay an effective response. Most wildfires are reported by the general public, and other alarms come from routine foot patrols and watchtower observers. Passing planes and satellites also occasionally spot something, but "the fire first appears on the ground, " Wang says. "When you see the fire from the sky, it is too late. "
The team says its new sensor can be placed near tree trunks’ bases and send a wireless signal to a nearby receiver if there is a quick temperature increase. That heat also powers the sensor itself, without replacing batteries. The team printed the substances onto ordinary paper to create a sensor for just $0.40.
But improving coordination among the different companies involved in firefighting is even more important to deal with, says Graham Kent, an earthquake expert at the University of Nevada, Reno, who was not part of the study. Kent is director of ALERT Wildfire, a network that uses cameras and crowd sourcing to watch for fires in California, Nevada and Oregon. "The whole way that you respond to a fire until it’s put out is like a ballet, " he says. "You’d have to choreograph (设计) it just so, with resources accurately used at the right time and place in the right order from detection to confirmation to assignment to extinguishment (熄灭). Fire detection is just step one. "
Wang says his team’s next steps are to extend the device’s signal range beyond the current 100 meters, which can limit practical use, and to develop a protective shield (防护罩) for it. The transmitter’ s effectiveness, he notes, will also need to be examined in the field ahead.
What does Kent mean in paragraph 4?
选项
A、Firefighting is easy but crucial.
B、Fire detection resources are rich.
C、Putting out a fire is an orderly activity.
D、Technology is the key to extinguishing a fire.
答案
C
解析
根据第四段的内容可知,改善消防机构之间的协调更为关键,人们在正确的时间和地点分配资源,从探测到确认再到调度再到火熄灭。由此可推知,灭火是一项合作而有秩序的活动,故选C。
转载请注明原文地址:https://kaotiyun.com/show/1i6D777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
Somepeoplemakeyoufeelcomfortablewhentheyarearound.【B1】________Thesepeoplehavesomethingincommon.Andonceweknoww
Somepeoplemakeyoufeelcomfortablewhentheyarearound.【B1】________Thesepeoplehavesomethingincommon.Andonceweknoww
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Morethantwo-thirdsofadultsintheUnitedStatesareoverweightandhalfofthemaretryingtoloseweight.Accordingtoare
TheTownofPressureandtheTownofPleasurewereneighborsbuthadnothingincommon.Residentsbuiltwallsto【C1】________
TheTownofPressureandtheTownofPleasurewereneighborsbuthadnothingincommon.Residentsbuiltwallsto【C1】________
WhatwillJasonprobablydo?
随机试题
醉酒的人犯罪,依我国刑法规定,()负刑事责任。
关于精子细胞的叙述,下列哪些是正确的()
属于中效化学消毒剂的是
A.链球菌B.猪瘟病毒C.食盐中毒D.维生素D缺乏E.维生素E-硒缺乏引起猪化脓性脑炎的病因是
腕部尺神经损伤表现为
根据水利工程建设项目管理有关规定,项目后评价分()个层次组织实施。
对知识型团队的绩效考核,应以()为导向。
某外贸进出口公司2015年10月发生如下经济业务:(1)从某汽车制造公司购进18辆国产小汽车,取得的发票注明不含税价100000元/辆,其中4辆作为业务车供本公司自用,2辆用于抵顶以前欠本市某船运公司240000元的债务,其余12辆出口,出口离岸价
某公司拟进行一项固定资产投资决策,设定折现率为10%,有四个方案可供选择。其中:甲方案的净现值率为-12%;乙方案的内部收益率为9%;丙方案的项目计算期为10年,净现值为960万元,(P/A,10%,10)=6.1446;丁方案的项目计算期为11年,年等
下列由公安机关执行的刑罚有( )。
最新回复
(
0
)