电子商务的交易包含（）。
A.商品流
B.物流
C.资金流
D.信息流
参考答案：A, B, C, D
(2013·银川一中一模)The TV series of Gong became popular and the theme song Love the feed sung by Yang Mi was a ________ at once and loved by young people.
A．shock
B．strike
C．hit
D．beat
液氨泵跳泵液位应在（）以下。
A.0.1m
B.0.15m
C.0.25m
D.0.45m
