Proper lighting is a necessary for good eyesight even though human night vision

游客2023-12-31 56

问题 Proper lighting is a necessary for good eyesight even though human night vision can be temporarily impaired by extreme flashes of light.

选项 A、needful
B、necessity
C、exigency
D、need

答案 B

解析词语应用本句意为：视力好需要有合适的照明，尽管人类的夜视偶尔会被极端的(过明或过暗)灯光的闪现削弱。所填之词在句中作表语，又由a限定，应填名词；因此排除选项A，因是形容词，表示：必要的，需要的；其余三个选项均为名词：B．necessity必要性，需要，必需品(指为了生存所必需的)；C．exigency苛求，紧急(事件)；D．need需要，必需，必需品(指需要某事或某物，尤其是它们还没发生或还无法利用)；因此B为答案。

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Proper lighting is a necessary for good eyesight even though human night vision

Notonly______thefalloftheczar,butitalsodestroyedtheprovisionalgovern

Old-growthforestsareAdefineasbeingatleast250Byearsold,thoughsomefor

Radiowastremendously______formanyyearsbeforethearrivaloftelevision.A、po

Sharkswereoncethoughttobeinstinctivekillingmachines,butitisnowbelie

Doyouagreeordisagreewiththefollowingstatement？Watchingtelevisionisbad

Thestudyofthepropertiesofnumbers,Platotellsus,habituatesthemindtot

IthoughtIjustmadeaperfectinnocuousremarkandhetookittoheartandfla

TotravelbyGreyhoundiseasy,cheapandconvenient,thoughnotsofastastrav

他英语很流利，可还是要用译员——有时还挑译员的毛病——这样他就有时间考虑如何回答提问了。AlthoughfluentinEnglish,heuses—

科学技术在促进人类进步的同时，也逐渐将人类推向了环境恶化的深渊，它到底是福还是祸呢?Thoughsciencepromoteshumanprogress

Britishairisfarcleanerthanitwasafewdecadesago.Fewerpeopleusec

Thepassageisprimarilyconcernedwithevaluating______[br]Inthelastparagr

Inmanypartsoftheworld,alienspeciesareharmingtheenvironmentandca

下列哪个抗体会造成血管内溶血的输血反应( )。A.抗Fy B.ABO血型不配

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