已知幂函数y=f（x）的图象经过点$\left(4,\frac{1}{2}\right)$，且f（a+1）＜f（10﹣2a），则实数a的取值范围是（　　）

我们应关爱生灵，关爱他人的生命与健康，远离暴力，做一个既遵守法律又乐于助人的人。(    )

琳琳经常不吃早餐就去上学，有时会出现头晕、心慌、注意力不集中等症状，原因是他血液中哪种物质的浓度过低？（  ）

   Of all the things we eat and drink，water is the1important.The human body can go2 food for a long time，but two3three days without water could make people4.
   A lot of people don't understand how5water the human body needs6well and many people don't drink enough，esecially in7weather. Most people drink8they are thirsty but in fact they need more water，expecially when they take9.A man's body is 65 to 75 percent of10. If we don't have enough water. We fell tired and may become ill.