金融衍生交易市场主流交易方式().
参考答案:套期保值
— Lucy had __________ accident.
— But luckily, she wasn’t hurt in _______ event at all.
A.a, a
B.an, an
C.an, the
D.the, an
延长在一地的旅游活动日程,地陪应怎样办理?