配送运输是按用户的要求将货物（）给客户的运输。
A.快速
B.准时
C.低成本
D.送达
参考答案：D
— Can you guess ______ the MP4 player yesterday?
— Sorry, I've no idea about it.[ ]
A.how much did he pay for
B.how can he get
C.how much he paid for
D.how did he get
在CD-I系统中，用户看到的CD-I图像是由四个图像平面组成，分别为（）
