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.

完形填空

     I read a book about the secret of successful kids last week. In this book, we are told about    1     children who not only do well in their studies but also are  2   at sports, music, and so on.

     One of the children in the book is John, a twelve-year-old boy. John works   3   at school and after school he does his homework and reviews what he has learned. John 4   a national science competition and won second prize. He is the captain of the school basketball team. And he takes piano or violin lessons every evening. He also  5   skiing on weekends.

     John is happy though he is  very  6  . He has a special notebook. In the notebook he writes his plans for the next few days. He 7   a smiling face beside each item(项目) that has been completed yet. He says that   8  you are well prepared you don't have to be worried.

     John's parents always give him their support. They spend a lot of time with him, discussing things with him and giving him 9  . They also love to play with John. John says, "Whenever it's time to   10  , we forget all the work and just enjoy ourselves together!"

（1）如图①，若∠B+∠D=∠BED，试猜想AB与CD的位置关系，并说明理由．

（2）如图②，要想得到AB∥CD，则∠1、∠2、∠3之间应满足怎样的位置关系？并说明理由．

24.5÷(3.2＋1.7)×0.24=（   ）

听觉是人类获取信息的第二大途径，耳是人体的重要感觉器官．耳的结构中相当于反射弧中感受器的是（　　）