如果切断电源，（）存储器存储的数据就丢失，所以其只适应于暂时保留控制过程中的处理数据。
A、RAM
B.CPU
C.ROM
参考答案：A
At home, he never seems to have time until after 10:30 pm, ________ his children have gone to bed.[ ]
A．whose time
B．when
C．on which
D．by which time
r对策生物种群的基本增长型通常是S型。
