有2个扩展机框的RNC3810的配置为（）。
A.B配置
B.C配置
C.D配置
D.E配置
参考答案：B
China's population is expected to increase to about 1.5 billion in 2040, ______it will start to decline slowly.
A．where
B．which
C．on which
D．after which
95599客服代表离席休息时，应将CSR系统设置为（）状态。
A、临时签退
B、保持
C、未就绪
D、签退
