【简介】感谢网友“雕龙文库”参与投稿，这里小编给大家分享一些，方便大家学习。
Late-Night Drinking Coffee lovers beware. Having a quick pick-me-up cup of coffee1 late in the day will play havoc with2 your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep. In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample, Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest6 that caffeine blocks production of the enzyme that drives melatonin production. 1. The author mentions pick-me-up to indicate that B neurohormone can wake us up. D decaf is a caffeinated coffee. A Caffeine blocks production of the enzyme that stops melatonin production. C Caffeine halves the bodys levels of sleep hormone. 3. What does paragraph 3 mainly discuss? B Different findings of Lotan Shilo and a team about caffeine. D The proof that the subjects took half an hour to fall asleep. A There are more enzymes in decaf drinkers urine sample. C Decaf drinkers produce less melatonin. 5. The author of this passage probably agrees that B we should not drink coffee after supper. D if we feel sleepy at night, we should go to bed immediately. 1. C pick-me-up指提神饮料，也就是一种剌激物，在这篇文章里具体指咖啡。所以，答案应选 C。 3. A第三段涉及的是一个实验，这个实验的目的是测试含咖啡因咖啡和脱咖啡因咖啡对睡眠的影响，该段主要谈论的是这个实验的结果。 5. B 文章的结尾谈到， Ohayon建议爱喝咖啡的人午饭后应该换喝脱咖啡因咖啡。另外，整个文章都在探讨咖啡因影响睡眠的机理，所以，作者大概会同意晚饭后不应该喝咖啡的说法。选项 A是一个全称判断，这等于说所有喜欢喝咖啡的人都比不喝咖啡的人睡觉少。这不一定，因为如果咖啡适量，喝咖啡的时间适当，咖啡不会影响睡眠。所以，作者可能不会同意这种说法。根据文章第二段第二个句子，选项 C是错的。根据文章第二段的第一个句子，我们体内褪黑激素 的浓度在我们上床时间前两个小时开始上升，而这个时候我们会开始有困意。反过来说就是，人们并非一有困意就睡觉。所以，选项 D不是答案。 咖啡爱好者注意了。在深夜喝一杯快速提神的咖啡会严重影响你的睡眠，跟兴奋剂一样，咖啡因会扰乱褪黑激素的自由流动，这种褪黑激素是大脑里促人睡眠的一种荷尔蒙。 LotanShilo和Tel Aviv大学Sapir医学中心的一组人员，在给六位志愿者做试验时发现，他们在饮了咖啡因的咖啡后比饮了脱咖啡因的咖啡后睡眼质量要差。平均来说，在喝了含咖啡因的咖啡后每晚睡眠时间336分钟，而喝了脱咖啡因的咖啡后则睡415分钟。同时他们得花半个小时入睡，是通常情况的两倍，另外，他们在床上辗转次数也要长一倍。 因为要花许多小时的时间才能将身体中的咖啡因除去， Ohayon建议咖啡爱好者应在午后换喝脱咖啡因的咖啡。
Late-Night Drinking Coffee lovers beware. Having a quick pick-me-up cup of coffee1 late in the day will play havoc with2 your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep. In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample, Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest6 that caffeine blocks production of the enzyme that drives melatonin production. 1. The author mentions pick-me-up to indicate that B neurohormone can wake us up. D decaf is a caffeinated coffee. A Caffeine blocks production of the enzyme that stops melatonin production. C Caffeine halves the bodys levels of sleep hormone. 3. What does paragraph 3 mainly discuss? B Different findings of Lotan Shilo and a team about caffeine. D The proof that the subjects took half an hour to fall asleep. A There are more enzymes in decaf drinkers urine sample. C Decaf drinkers produce less melatonin. 5. The author of this passage probably agrees that B we should not drink coffee after supper. D if we feel sleepy at night, we should go to bed immediately. 1. C pick-me-up指提神饮料，也就是一种剌激物，在这篇文章里具体指咖啡。所以，答案应选 C。 3. A第三段涉及的是一个实验，这个实验的目的是测试含咖啡因咖啡和脱咖啡因咖啡对睡眠的影响，该段主要谈论的是这个实验的结果。 5. B 文章的结尾谈到， Ohayon建议爱喝咖啡的人午饭后应该换喝脱咖啡因咖啡。另外，整个文章都在探讨咖啡因影响睡眠的机理，所以，作者大概会同意晚饭后不应该喝咖啡的说法。选项 A是一个全称判断，这等于说所有喜欢喝咖啡的人都比不喝咖啡的人睡觉少。这不一定，因为如果咖啡适量，喝咖啡的时间适当，咖啡不会影响睡眠。所以，作者可能不会同意这种说法。根据文章第二段第二个句子，选项 C是错的。根据文章第二段的第一个句子，我们体内褪黑激素 的浓度在我们上床时间前两个小时开始上升，而这个时候我们会开始有困意。反过来说就是，人们并非一有困意就睡觉。所以，选项 D不是答案。 咖啡爱好者注意了。在深夜喝一杯快速提神的咖啡会严重影响你的睡眠，跟兴奋剂一样，咖啡因会扰乱褪黑激素的自由流动，这种褪黑激素是大脑里促人睡眠的一种荷尔蒙。 LotanShilo和Tel Aviv大学Sapir医学中心的一组人员，在给六位志愿者做试验时发现，他们在饮了咖啡因的咖啡后比饮了脱咖啡因的咖啡后睡眼质量要差。平均来说，在喝了含咖啡因的咖啡后每晚睡眠时间336分钟，而喝了脱咖啡因的咖啡后则睡415分钟。同时他们得花半个小时入睡，是通常情况的两倍，另外，他们在床上辗转次数也要长一倍。 因为要花许多小时的时间才能将身体中的咖啡因除去， Ohayon建议咖啡爱好者应在午后换喝脱咖啡因的咖啡。
