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  3. Using a computer or smartphone at night can cause us to【C1】______on the pounds, new research has revealed. The study found a

Using a computer or smartphone at night can cause us to【C1】______on the pounds, new research has revealed. The study found a

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问题    Using a computer or smartphone at night can cause us to【C1】______on the pounds, new research has revealed.
   The study found a link between blue light【C2】______—blue light is【C3】______by smartphones and tablets—and increased hunger. It found that exposure【C4】______the light increases hunger levels for several hours and even increases hunger levels【C5】______eating a meal.
   Results of the US study show that blue-enriched light exposure, compared with【C6】______light exposure, was【C7】______with an increase in hunger that began 15 minutes after light onset and was still【C8】______almost two hours after the meal. Blue light exposure has also already been shown to decreased【C9】______in the evening increasing the risk of insomnia.
   Study co-author Ivy Cheung, of Northwestern University, in Chicago, said: "A single three-hour expo sure to blue-enriched light in the evening【C10】______impacted hunger and glucose metabolism. " "These results are important because they suggest that【C11】______environmental light exposure for humans may represent a novel【C12】______of influencing food【C13】______patterns and metabolism."
   The study group【C14】______10 healthy adults with regular sleep and eating schedules who received【C15】______carbohydrate-rich meals. They completed a four-day trial【C16】______dim light conditions, 【C17】______involved exposure to less than 20 lux during 16 hours【C18】______and less than three lux during eight 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 were compared with dim light exposure on day two.
   Ms Cheung said more research is needed to determine the【C19】______of action【C20】______in the relationship between light exposure, hunger and metabolism.
【C6】
选项 A、dim
B、dull
C、dark
D、dusky
答案A
解析 本题考查形容词辨析。此处阐释研究发现，blue-enriched light exposure，compared with______light exposure，由常识可以推断，与明亮光线相对应的应该是昏暗的光线，而且浏览下文可发现dim light conditions，根据这一线索可选出本题答案为A．dim“暗淡的，昏暗的”。dull“迟钝的，呆滞的；阴暗的”，dark“黑暗的”，dusky“黑黝黝的，(颜色)暗淡的”，均与文意不符。
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