ZXWNMSCSNO.7信令网用于接入到（）板上。
A.SPB
B.APB
C.IPI
参考答案：A
成本逼近法一般适用于有收益的商业物业的评估。（）
Mike went boating with his friends last weekend. They ______ a good time.
A．have
B．had
C．will have
D．are having
