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
考研
The (1)_____ of the fluorescent tube (2)_____ a major revolution in the development of better and cheaper lighting. First shown
The (1)_____ of the fluorescent tube (2)_____ a major revolution in the development of better and cheaper lighting. First shown
admin
2011-10-20
30
问题
The (1)_____ of the fluorescent tube (2)_____ a major revolution in the development of better and cheaper lighting. First shown at the New York and San Francisco World (3)_____ in 1939, this more efficient, more diffuse, longer-lived lamp has been (4)_____ improved, so that slowly it (5)_____ the supremacy of the incandescent household globe. The fluorescent tube (6)_____ Australian homes, shops and factories today is seven or eight times (7)_____ the tubes that brought shadow-free lighting to many of Britain’s wartime factories. Its (8)_____ too, is much greater—from 2,000 hours in 1940 to mc/re than 7, 500 hours today.
But (9)_____ its (10)_____ use for more than 30 years, the fluorescent tube remains a
(11)_____ to many of its users. It is built (12)_____ a completely different (13)_____ from the incandescent light. In the incandescent bulb, a tungsten wire (14)_____ than a human hair, is brought to white-hot temperature by passing an electric (15)_____ through it. In the fluorescent tube a stream of electrons bombards a gas containing mercury, (16)_____ invisible ultraviolet radiation. The ultraviolet rays hit the fluorescent coating that (17)_____ the tube, (18)_____ it to grow. A 40 watt fluorescent tube gives twice as much light as a 100.watt tungsten globe, (19)_____ about five times as long, and runs cool enough to (20)_____ higher levels of light.
选项
A、long
B、extensive
C、exquisite
D、extreme
答案
B
解析
extensive指广泛使用。
转载请注明原文地址:https://kaotiyun.com/show/VHp4777K
0
考研英语一
相关试题推荐
WriteacompositiononthetopicAREPETSGOODFORMANKINDontheoutlinebelow:1.Pet-keepingisbeneficialtopeopleins
Britain’sgardenershaverevealedoneoftheirgreatestpethates—otherpeople’scats.Okay,they’resadisticmurderers—butisi
Psychologists______Parentswhowriteletterstocomplaintelevisioncompanies______
ThetimehascomeforhumanitytojourneytoMars.We’reready.(46)ThoughMarsisdistant,wearefarbetterpreparedtodayto
Economistsbelievethatjobearningsinfluencechoiceofoccupation.Theyacknowledgethatpeopleplacevaryingemphasis【C1】____
YourfriendMaryBrownwillgotoWashingtonD.C.nextmonth.WritealettertoTonywhoisthereandintroduceMarytohim.You
Eachscientificspecialtyhasitsownsetofjournals.PhysicistshavePhysicalReviewLetters,cellbiologistshaveCell,neuro
Accordingtothepassage,whichofthefollowingeighteenth-centurydevelopmentshadastrongimpactonsilversmiths?According
Foralmosttenyears,NoelHeathandGlenroyMatthew,betterknownas"Zambo"and"Bobo",haveescapedattemptsbytheUnitedSt
随机试题
下列选项中属于职业道德范畴的是()。
在Windows的话框中,有一组复选框选项,根据需要()
下列属于单务合同的是()。A.借用合同B.保管合同C.委托合同D.租赁合同
在无菌操作下阴道破膜后发现放出的羊水呈血性,应警惕
有关重型胎盘早剥诊断依据,正确的是
滴丸剂的生产中下列基质中哪几项是水溶性基质
下列表述正确的有()
根据公司法律制度的规定,当公司出现特定情形,继续存续会使股东利益受到重大损失,通过其他途径不能解决,持有公司全部股东表决权10%以上的股东提起解散公司诉讼的,人民法院应当受理。下列各项中,属于此类特定情形的是()。
教育法律法规是()及其常设机构制定的关于教育规范性的文件。
Data can be(74)to another part of the spreadsheet. The original data remains.
最新回复
(
0
)