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
Scientists have been taking a closer look at the lighting in our homes, offices and vehicles, and they’re seeing a possible way
Scientists have been taking a closer look at the lighting in our homes, offices and vehicles, and they’re seeing a possible way
admin
2011-02-28
53
问题
Scientists have been taking a closer look at the lighting in our homes, offices and vehicles, and they’re seeing a possible way to improve health.
Engineer E. Fred Schubert is talking about a new era of "smart" light sources. "We are looking at lighting systems that provide more than lighting," he says.
He’s talking about light-emitting diodes(二极管),or LEDs. Most people know them as being quite small, like the lights that form numbers on digital clocks. But recent technological advances have made them much more powerful, able to illuminate swimming pools and serve as traffic signals, for example.
Meanwhile, the lighting in offices and schools could be improved to help people stay healthy and productive, by acting on their internal body clocks. The 24-hour internal body clock is best known for governing cycles of alertness and sleep, and for producing jet lag( 飞行时差) when people travel across time zones. Lights cues, especially blue light, help keep the clock on its daily cycle. We’re pretty much blue-sky detectors. Our clocks count on bright days and dark nights.
But that’s not necessarily what modern life delivers. During the winter in the northeast of America, for example, a person can commute roundtrip in the dark and sit all day in electric light that’s fine for vision, but may be too dim to stimulate the body clock. That’s called biological darkness.
How that affects people has been hard to document in the general population, but studies suggest such possibilities as seasonal depression, fatigue, sleep disturbances and maybe even cancer, especially breast cancer. Some studies suggest reduced productivity on the job. To counter that, architects and lighting engineers might someday take body clocks into account when they design lighting schemes. They may be encouraged to take steps like providing plenty of natural Night through windows and skylights, and installing bright blue LEDs near computer screens to give a dose of clock-adjusting light.
According to the passage, which of the following is NOT true?
选项
A、The internal clock of us governs our cycles of alertness and sleep.
B、The internal clock of us can produce jet lag.
C、Long time in the biological darkness is fine to Americans.
D、During the winter in the northeast of America, a person can commute roundtrip in the dark.
答案
C
解析
见第六段第一句话 How that affects people has been hard to document in the general population,but studies suggest such possibilities as…它如何影响大众很难记录,但是研究表明可能会出现……。这里“它”指上一段最后的biological darkness。
转载请注明原文地址:https://kaotiyun.com/show/tttd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Accordingtothespeaker,whatshouldthelistenersdoassoonaspossible?
随机试题
研究函数f(x)=的连续性.
清风徐来,水波不兴。
简述补体系统的生物学活性。
患者,男性,25岁。在京务工。因发热、咳嗽、咳痰4天来院,在家未用任何药物。查体见右下肺实变体征,胸部X线示右肺大片浸润影,血气分析示pH7.36,PaO264mmHg,PaCO235mmHg。如经验性抗菌治疗无效,则下列措施中应首选
哪些器官发生的梗死属于贫血性梗死
下列级别中,不属于全国公路建设从业单位信用评价等级的是()。
钢筋混凝土用钢筋,非合金构成,直径20mm,热轧后未经其他加工,带有轧制过程中产生的变形,直条状报验
标志着中国共产党在实践中开始探索本国建设社会主义道路的文献是()
认知结构
有以下程序#include<stdio.h>#include<string.h>typedefstrtlct{charname[9];charsex;floatscore[2];}STU;void
最新回复
(
0
)