第一部分：阅读理解(共两节，满分18分)
第一节(共4小题；每小题2分，满分8分)
阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
First aid is emergency care for a victim of sudden illnesses or injuries until more skillful medical treatment is available.It may save a life or improve certain vital signs including pulse，temperature，a clear airway(气道)，and breathing.In minor emergencies，first aid may prevent a victim's condition from turning worse and provide relief from pain.First aid must be administered as quickly as possible.In the case of the critically injured，a few minutes can make a difference between complete recovery and loss of life.
