我国最长的内流河是下列中的（    ）

老年痴呆症患者的脑血管中有一种特殊的β一淀粉样蛋白体，它的逐渐积累可能导致神经元损伤和免疫功能下降。某些基因的突变会导致β一淀粉样蛋白体的产生和积累。下列技术不能用于老年痴呆症治疗的是（  ）

材料一：三湘都市报2014年11月12日报道：因提醒同学值日打扫发生纠纷，在长沙一中专学校就读的16岁女生小梦连续两天被班上15名女同学在宿舍围殴，导致鼓膜穿孔、肾挫伤，并被拍裸照威胁。打人者包括班长、副班长、纪律委员等朝夕相处的同学。小梦被打时当时宿舍里共有6名室友，其中5人看着她被打了3个小时，既没劝架也没报告老师，1人还参与了群殴。小梦说，“虽然我知道那些沉默的室友是害怕被报复没劝架．但我心里没法原谅她们的冷漠。”

材料二：齐鲁晚报2014年12月18日报道：近日，沂源县历山街道新城路小学采取多举措防止校园暴力。一是召开全体师生会议，普及防暴力常识；二是加强门卫管理，控制外来人员进入；三是各班通过班班通观看模拟制伏“歹徒”持刀袭击校园学生的场景，让师生明白该如何应对校园暴力。此举提高了全体师生应对突发暴力事件的能力。

15×5=____   120×7=____

8×12=____   22×4=____

    When you stay away form your home for a long time, you start to miss your good bed, your good parents. Believe it or not, you're feeling homesick. You can help yourself to feel less homesick. Here's how:

      ⑴   .If you're going away from home, bring your favourite clothes, you can also bring some pictures of the people who you may miss. You can look at them any time you want.

       ⑵   .The busier you are, the less time you'll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities whenever you are.

       ⑶   .You can make a plan for when you'll call your mom or dad. You can also keep in touch with family and friends by email or text messages.

       ⑷   .Sometimes, telling someone that you're feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.