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外语
Both tea and coffee contain caffeine, an odorless, colorless ______ that is soluble in water and in alcohol.
Both tea and coffee contain caffeine, an odorless, colorless ______ that is soluble in water and in alcohol.
admin
2011-01-21
54
问题
Both tea and coffee contain caffeine, an odorless, colorless ______ that is soluble in water and in alcohol.
选项
A、substance
B、material
C、matter
D、object
答案
A
解析
近义词辨析。substance意为“物质”,一般指比较具体的或有特殊性质的物质,如:Soils consist of various chemical substances.(土壤含有多种化学物质。)material意为“材料,原料”,指能直接制成成品的最原始的东西,强调制成品的来源,如:material for a comedy(喜剧素材);matter意为“物质,物料”,“一般指宇宙间物质的整体,与精神相对,如:Matter exist in three states:solid,liquid and gas.(物质以三种形态存在:固态、液态和气态。)object意为“物体”,尤指可摸得着的实物,如:unidentified flying object(UFO)(来历不明的飞行物)。原句中提到的咖啡因是一种无色无味溶于水的物质,强调是具体物质,故选A)。
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大学英语四级
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