题目

What should we do if one of our classmates suddenly falls ill or gets hurt? Here are some steps you should follow. But always remember to look for medical care after first aid (急救) if the wound is serious.Broken bones: Take away clothing from the wound. Use an ice pack. Don’t move the hurt body part while waiting for the doctor to arrive.Animal bites: Wash the bite area with soap and water. Pack the wound with a clean cloth if it is bleeding. If the bleeding has stopped, cover the area with a bandage and take the person to the hospital. Make sure you remember what kind of animal it is so对化学方程式2H2+O2点燃.2H2O的含义叙述正确的是（　　）A．氢气加氧气点燃等于水B．氢气和氧气在点燃条件下反应生成水C．两个氢分子加一个氧分子等于两个水分子D．2mol氢气和1mol氧气生成2mol水