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

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

游客2025-01-31  1
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 本题考查词语应用。句意为：合适的照明是视力好的必要条件，尽管人类的夜视偶尔会被极端灯光的闪现损害。所填之词在句中作表语，又由不定冠词a限定，所以应为可数名词单数。A是形容词，表示“必要的，需要的”，故排除；necessity“必要性，需要”，符合句意；exigency“苛求，紧急(事件)”；need“需要，必需”，为不可数名词。因此，答案是B。
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