垄断的形式可分为卖方垄断和买方垄断两种:前者是指对某种产品出售权的垄断;后者是指对某种产品或生产要素购买权的垄断。( )
参考答案:对
Thanks a lot for agreeing _____ us _____ on the trip.[ ]
A. let, go
B. to let, go
C. to let, to go
D. letting, going
当电力变压器的储油柜或防爆管发生喷油时,应派专人监视其情况的发展变化