题目

我国科学家屠呦呦发现并提取了青蒿素，将其应用于医药临床，首获诺贝尔科学奖，青蒿素的化学式为C15H22O5，下列说法不正确的是（     ） A.       该物质的碳、氢、氧三种元素的质量比为90：11：40 B.       C15H22O5的相对分子质量为282 C.       青蒿素由15个碳原子、22个氢原子、5个氧原子构成 D.该物质的一个分子由42个原子构成请阅读下面关于校园意外受伤的紧急处理方法，进行配对，将相应的段落标题填入第31～34空格中，并完成第35小题．A．Ice Bag Cools the Injury Part B．Keep Still and RestC．Press Hard with the Cloth D．Lifting the Injured PartAt school lots of students get injured when they are doing sports or playing with each other. Here are the tips you can do at once after an injury.31Don’t move the injured part of your body. You’d better lie down and rest.32Get a bag with an ice in it. Keep the ice bag on the injured part of your body for half an hour. Take away the bag for a quarter. Then put it back on for several minutes.33Get a piece of clean cloth around the body area. Tie the cloth hard enough to hold the ice. Don’t press it too hard.34 Put up your injured area which is higher than the level of your heart. If it’s a serious injury, call 120 immediately.1._____2._____3._____4._____5.In which part of a magazine can you most probably read this passage?A. News. B. Health. C. Travel. D. Fashion.