首页
登录
职称英语
The modem age is an age of electricity. People are so used to electric light
The modem age is an age of electricity. People are so used to electric light
游客
2024-02-27
7
管理
问题
The modem age is an age of electricity. People are so used to electric lights, radios, televisions, and telephones that it is bard to imagine what life would be like without them. When there is a power failure, people grope (摸索) about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
Yet people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for millions of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cells sent out tiny pulses of electricity. As the heart beats, it sends out pulses that can be measured and recorded on the surface of the body. When the pulses are recorded, they form an electrocardiogram(心电图), which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram, The electric currents generated by most living cells are extremely small--of- ten so small that sensitive instruments are needed to record them. But in some animals, certain muscled cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effect can be astonishing.
The electric eel is an amazing living storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. ( An electric house current is only one hundred twenty volts. ) As many as four-fifths of all the cells in the electric eel’s body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to the length of its body. [br] The author mentions all of the following as results of a blackout EXCEPT ______.
选项
A、refrigerated food items may go bad
B、traffic lights do not work
C、people must rely on candlelight
D、elevators and escalators do not function
答案
D
解析
细节题,在第一段中提到了停电后所带来的种种不便,D未提到。
转载请注明原文地址:https://tihaiku.com/zcyy/3486146.html
相关试题推荐
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
SomepeoplelikewatchingTVathome,andothersmaylovehiking.ButIlike
随机试题
Ifyouhadtoguesstheorganthathasundueinfluenceonyouremotions,your
LanceArmstrongisthirty-threeyearsoldandisoneofthebestathletesin
影响财务管理目标的因素有()。A.投资报酬率 B.风险 C.投资
根据《流动资金贷款管理暂行办法》的规定,流动资金贷款借款人应信用状况良好,无重大
EAR切点法评价群体营养素摄入量时,日常摄入量低于EAR的人数占人群中的比例(
将不同网站按2015年在武汉和南京两地日到达人数之差从低到高排列,以下正确的
根据《中华人民共和国公务员法》的规定,公务员交流的范围不包括()A.国有企业事
社会工作者招募癌症患者组成小组,通过组员交流,增强组员对未来生活的信心。这个小组
男性,32岁。因遇交通事故,胸部受挤压已30分钟,自觉胸痛。查体:血压120/
(2018年真题)根据建设工程的工程特点和施工生产特点,施工质量控制的特点有(
最新回复
(
0
)