[解析]
(1)推理判断题。根据文章第一段It's no secret that sleep is important to your overall health,but a lack of sleep could have great effects on your heart,a new study shows.The researchers said people with insomnia(失眠症)are more likely to have a heart attack.(众所周知,睡眠对你的整体健康很重要,但一项新的研究显示,睡眠不足可能对你的心脏有很大影响。研究人员表示,失眠的人更有可能患心脏病。)可知第一段的作用是引出主题:睡眠不足对心脏健康的影响。故选C。
(2)推理判断题。根据文章第三段"We see it probably in 1 in 10 patients in the United States,"said Gulati,who was not involved in the new research."It is my impression that almost everyone experiences insomnia at some point in their life.The estimate is that 1 in 2 adults experience it at some point in their life,maybe in the short term because of stressful moments."("在美国,我们可能在十分之一的患者中看到它,"Gulati说,他没有参与这项新的研究。"在我的印象中,几乎每个人都会在一生中的某个时候经历失眠。据估计,有1/2的成年人在一生中的某个时候会经历这种情况,可能是因为压力大而在短期内经历这种情况。)可知从Gulati的话来看,失眠是生活中常见的现象。故选B。
(3)细节理解题。根据文章最后一段Those who slept five hours or less had the highest association with heart attack risk and were 1.56 times more likely to have a heart attack than people who slept seven or eight hours.Longer sleep duration wasn't always more protective.The study found that people who slept six hours a night had a lower risk of a heart attack than those who slept nine hours or more."A lot of studies have pointed somewhere between seven and eight hours of sleep being the magic number for us,"another researcher said."There is obviously variability for everyone,but too much sleep is rarely the issue."(睡眠时间不超过5小时的人患心脏病的风险最高,比睡眠时间在7到8小时的人患心脏病的风险高1.56倍。更长的睡眠时间并不总是更有保护作用。研究发现,每晚睡六个小时的人比睡九个小时或更多的人患心脏病的风险低。另一位研究人员说:"许多研究指出,7到8小时的睡眠对我们来说是个神奇的数字。"。"很明显,每个人都有差异,但睡眠过多很少会成为问题.")可知把质量放在数量之前。A.Put quality before quantity.把质量放在数量之前;B.Too much is as bad as too little.太多和太少一样糟糕;C.Bite off more than one can chew.贪多嚼不烂;D.Hope for the best,but prepare for the worst.抱最好的希望,做最坏的准备。故选A。
(4)观点态度题。根据文章最后一段The study also found an association between increased heart attack risk and how long a participant slept each night.Those who slept five hours or less had the highest association with heart attack risk and were 1.56 times more likely to have a heart attack than people who slept seven or eight hours(该研究还发现,心脏病发作风险的增加与参与者每晚睡多长时间有关。睡眠时间少于或等于5小时的人患心脏病的风险最高,比睡眠时间在7到8小时的人患心脏病的风险高1.56倍)可知作者对失眠和心脏病之间关系的态度是客观的。A.Pessimistic.悲观的;B.Indifferent.不在乎的;C.Objective.客观的;D.Positive积极的。.故选C。