信用卡的支付方式包括（）。
A.在线刷卡记账
B.POS结账
C.ATM提取现金
D.网络直接支付
参考答案：A, B, C, D
They considered _____ a computer, which was considered _____ a great help in their work. [ ]
A. to buy; to be
B. buying; being
C. to buy; being
D. buying; to be
在一株树上的相同位置，早晨和傍晚各选一片大小相同的叶片。分别为a和b。将两片叶脱水后称重，其重量关系是[ ]
A． a=b
B． a＞b
C． a＜b
D．无法确定
