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
The modem age is an age of electricity. People are so used to electric lights, radios, televisions, and telephones that it is ba
The modem age is an age of electricity. People are so used to electric lights, radios, televisions, and telephones that it is ba
admin
2010-06-01
42
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.
It can be inferred from the passage that the longer an eel is the ______.
选项
A、more beneficial it will be to science
B、more powerful will be its electrical charge
C、easier it will be to find
D、tougher it will be to eat
答案
B
解析
细节题,最后一段中可找到答案。
转载请注明原文地址:https://kaotiyun.com/show/9oN7777K
0
大学英语四级
相关试题推荐
A、He’llteachthewomanhowtorideabicycle.B、He’lltakehisbicycletoschooltoo.C、He’lljoinheratherexerciseclass.D
GallaudetUniversitycurrentlydoesnotallowstudentstokeeppetsintheirdormrooms.Exceptionsaremadeonlyforservicean
A、Heaskedsomeoneelsetomowthelawn.B、Nobodymowedthelawn.C、Hewillwaituntilnextweek.D、Hehadaproblemwithhislu
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessgiftsareoftenpresentedafterthe【C1】______isclo
A、Movingofficefurniture.B、Hangingaposter.C、Paintingaroom.D、Readinganewsbulletin.A
TheArtofPublicSpeakingThinkwhatmighthappenifyoutriedtobuildahousewithoutafloorplanoranarchitect’sblu
A、Onabus.B、Onaplane.C、Onatrain.D、Inataxi.B根据选项,对话的内容与地点相关。对话中出现了“…goingtolandsosoon.”,说明他们是在飞机上,因此正确答案为B。
A、Thetestwasconsiderablyeasy.B、Thetestwastough.C、Thefirstquestionwashard.D、Allthequestionsinthetestwereeasy
MichaelJordanisanAmerican【B1】______basketballplayerintheNBA,wholedtheChicagoBullstofiveNBA【B2】______.Jordanwas
A、Inadentist’soffice.B、Inahospital.C、Inadrugstore.D、Inadoctor’soffice.B推理题。从“AspirinisthestrongestmedicationI
随机试题
X线的穿透性的作用,具体表现为:X线波长________;穿透力________,能穿透可见光不能穿透的物体;在穿透过程中有一定程度的吸收,即衰减。
“李杜诗篇万口传,至今已觉不新鲜。江山代有才人出,各领风骚数百年”的作者是()
怀疑胃溃疡恶变时的最佳处理措施是
女,24岁。停经58天,13天前行人工流产吸宫术。术后持续阴道流血。为明确诊断,首先应选用的辅助检查方法是
英译汉:“means of conveyance; means of transport”,正确的翻译为:( )。
产业布局政策一般遵循的原则有()。
心理发展
算法的时间复杂度与()有关。
下列属于法律关系的是哪一项?()
A、三年B、一年C、五年A
最新回复
(
0
)