[单选题]在相分裂导线上工作时,安全带(绳)应挂在同一根子导线上,后备保护绳应挂在( )上。
A.同一根子导线
B.相邻两根子导线
C.任意两根子导线
D.整组相导线

{{B}}First Aid{{/B}}
First aid is emergency care for a victim of sudden illness or injury 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 the difference between complete recovery and loss of life.
First-aid measures depend upon a victim’s needs and the provider’s level of knowledge and skill. Knowing what not to do in an emergency is as important as knowing what to do. Improperly moving a person with a neck injury, for example, can lead to permanent spinal (脊柱的) injury and paralysis (瘫痪).

A. saving a victim’s life.
B. preventing a victim’s condition from getting worse.
C. helping a person avoid sudden illness or injury.
D. relieving a victim from pain.