直通车扣费的原理是？（）
A.按照展现量
B.按照展现时长
C.按照佣金比例
D.按照点击扣费
参考答案：D
---How long __________ your parents ___________?
---For about twenty years.
A．did, marry
B．have, married
C．have, got married
D．have, been married
营业部不得受理法人以个人名义开立证券交易结算资金账户、个人以法人名义开立账户。( )
