“商易通”固定电话设备具有（）等功能。
A.余额查询
B.转账收款
C.转账付款
D.末笔交易查询
参考答案：A, B, C, D
The girls ______ to swim last month and they can swim very well now. [ ]
A. are taught
B. were taught
C. have taught
D. taught
交换器在反洗时排水应不应该携带树脂颗粒？
