三农电话银行必须以（）为载体。
A.惠农借记卡
B.金穗准贷记卡
C.惠农信用卡
D.金穗借记卡
参考答案：A
I _____ Ping –pong quite well, but I haven’t had time to play since the new year.
A．played
B．will play
C．have played
D．play
电能计量装置可能发生的计量失常、故障及其原因有哪些？
