Question

【题目】Night Milk and Sleep

A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off — if it is milked from a cow at night.

Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.

The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night. Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

Night milk quickened the start of sleep and caused the mice to sleep longer.

While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

【1】What does the phrase ‘nod off’ in the first paragraph mean?

A. Try to keep awake.

B. Try to sleep a longer time.

C. Change from being awake to a sleeping state.

D. Change from a sleeping state to being awake.

【2】According to the text, the mice being fed with night time milk _________.

A. woke up later B. were more anxious

C. were less active D. could not sleep well

【3】Why do lots of people think milk is excellent for helping sleep?

A. Because many people like drinking milk.

B. Because it’s been tested on mice ten times.

C. Because it can make people more energetic.

D. Because it contains calcium, which helps people to relax.

Answer 1

【答案】

【1】C

【2】C

【3】D

【解析】试题分析：这是一篇科普文，主要讲了晚上采集的牛奶和睡眠的关系。通过对白鼠的测试表明，晚上采集的牛奶含有更多的褪黑激素（melatonin），摄入者能更好地睡眠以及睡更长的时间。这个研究成果已经用来帮助有睡眠问题的人——注射褪黑激素针剂以帮助睡眠。

【1】题意：第一段中的“nod off”是什么意思？考查词义理解题。A. Try to keep awake. 尽量保持清醒。B. Try to sleep a longer time. 试着睡更长的时间。C. Change from being awake to a sleeping state.从清醒到睡眠状态的转变。D. Change from a sleeping state to being awake. 从睡眠状态转变为清醒状态。根据下文的解释“night milk” contains more melatonin, which has been proven to help people feel sleepy and reduce anxiety.，“夜奶”含有更多的褪黑激素，而褪黑激素被证明能帮助人们感觉困倦和减少焦虑，可知是有助于人们打盹，故选C。

【2】题意：根据该文，喂食夜间奶的小鼠 。考查细节理解题。根据Night milk quickened the start of sleep and caused the mice to sleep longer.，被喂食了夜奶的老鼠不太活跃，活动较少，可知选C。

【3】题意：为什么很多人认为牛奶对睡眠有好处？考查细节理解题。A. Because many people like drinking milk. 因为很多人喜欢喝牛奶。B. Because it’s been tested on mice ten times.因为它已经在老鼠身上测试过十次了。C. Because it can make people more energetic.因为它能让人们更有活力。D. Because it contains calcium, which helps people to relax.因为它含有钙，有助于人们放松。根据Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.，可知因为钙含量可以帮助人们放松，故选D。