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
81
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、Markets
B、Affairs
C、Centers
D、Fairs
答案
D
解析
fairs指"商品展览会,商品交易会"。这里应该指展览会。
转载请注明原文地址:https://kaotiyun.com/show/wHp4777K
0
考研英语一
相关试题推荐
Intheeyesofvisitorsfromtheoutsideworld______Itcouldbeinferredfromthelastparagraphthat______
Theword"liability"(Para.1)mostprobablymeans______Itcanbeinferredfromthepassagethatpeople’sviewsonbeautyare
Psychologists______Parentswhowriteletterstocomplaintelevisioncompanies______
ThetimehascomeforhumanitytojourneytoMars.We’reready.(46)ThoughMarsisdistant,wearefarbetterpreparedtodayto
Thefirsttwostagesinthedevelopmentofcivilizedmanwereprobablytheinventionofweaponsandthediscoveryoffire,altho
Theneedtogotocollegeisrealized,______offersopportunitiesforbettercareers.
Ababywho______whenyounghasthebetterchanceofgrowingupsuccessfully.
Youhavejustreceivedaletterfromacompany,whichrepliedyourapplicationforajobandaskedyoutogototheinterviewon
Accordingtothepassage,whichofthefollowingeighteenth-centurydevelopmentshadastrongimpactonsilversmiths?Incoloni
随机试题
Excel2010中调整某列列宽的方法正确的是______________。
女性,35岁,因甲状腺肿块在当地行甲状腺肿块切除术后5天,病理学诊断为甲状腺乳头状腺癌Ⅱ级。对该患者的进一步处理是
颅骨软化多见于方颅多见于
普陀山是我国佛教四大名山之一,普陀山三大寺分别是()。
当企业处于经济周期的()阶段时,应该出售多余设备、削减存货、停止长期采购、停产不利产品和停止扩张。
A、 B、 C、 D、 C
若以X表示期权的执行价格,ST代表资产的到期价格,则正确的是()。
(2008年)设函数f(x)在区间[一1,1]上连续,则x=0是函数g(x)=的()
在会议开始前,市场部助理小王希望在大屏幕投影上向与会者自动播放本次会议所传递的办公理念,按照如下要求完成该演示文稿的制作:在考生文件夹下,打开“PPT素材.pptx”文件,将其另存为“PPT.pptx”(“.pptx”为扩展名),之后所有的操作均基于此
TherearemanytheoriesaboutthebeginningofdramainancientGreece.Theonemost(1)______acceptedtodayisbasedontheass
最新回复
(
0
)