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  3. 根据以下材料，回答 Using a computer or smartphon

根据以下材料，回答 Using a computer or smartphon

题库2022-08-02  9
问题 根据以下材料，回答Using a computer or smartphone at nightcan cause us to  11  on the pounds, new research has revealed.The study found a link between blue light  12 --blue light is  13  by smartphones and tables--and increasedhunger. It found that exposure to the light increases hunger levels for severalhours and even increases hunger levels  14  eating a meal.Results of the US study show thatblue-enriched light exposure, compared with  15 light exposure, was  16   with an increase in hunger that began 15minutes after light onset and was still present almost two hours after themeal. Blue light exposure has also already been shown to decreased  17  in the evening, increasing the risk ofinsomnia.Study co-author Ivy Cheung, of NorthwesternUniversity in Chicago, said, "A single three-hour exposure toblue-enriched light in the evening 18  impacted hunger andglucose metabolism." "These results are important because theysuggest that  19   environmental light exposure for humansmay represent a novel  20  of influencing food intake patterns andmetabolism."The study group  21 10 healthy adults with regular sleep and eating schedules who received22  carbohydrate-rich meals. They completed afour-day trial  23  dim light conditions, which involvedexposure to less than 20 lux during 16 hours  24  and less than three lux duringeight hours of sleep. On day three they were exposed to three hours of 260 lux,blue-enriched light starting 10.5 hours after waking up, and the effects werecompared with dim light exposure on day two.Ms Cheung said more research is needed todetermine the  25  of action involved in the relationshipbetween light exposure, hunger and metabolism.A.in    B.on      C.under    D.for
选项 A.in   
B.on      
C.under   
D.for
答案 C
解析 考查介词辨析。他们在昏暗光线环境下完成了一个为期四天的实验。under conditions意为“在……情况下”。in condition意为“处于健康状况”，on the condition意为“以……为条件”，for不与condition连用。故选C。
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