试解释NACC的含义。
参考答案：网络辅助小区改变，即在源小区上发送邻区的系统消息。
小王家饲养的鸡和鸭一共有239只，其中鸭的只数比鸡的只数的3倍还多15只。小王家养鸡和鸭各多少只？
It's said that the power plant is now large as what it was.
A．twice as
B．as twice
C．twice much
D．much twice
