[单选题]
A refrigerator removes heat from the freezi :s- zqriahfegh d/n;k)3 1wses6/v7hng compartment ak8wr sqblot+o4x))5th mr 1lk, m 1xy1t the rate of 20 kJ ax1,xmkbyho 8tm +k5ql )t1ro1 wrl)4snd ejects 24 kJ into a room per cycle. What is the coefficient of performance?
