安装家庭电路时,从进户线到用电器之间有闸刀开关、电能表、熔断器,它们正确的排列顺序应是( )
A:闸刀开关、熔断器、电能表
B:电能表、闸刀开关、熔断器
C:熔断器、电能表、闸刀开关
D:电能表、熔断器、闸刀开关
Our school library has floors, and the reading room is on the floor.