下列属于证券经营机构的是（）
A.证券承销商
B.证券评级商
C.证券经纪商
D.证券自营商
E.证券服务商
参考答案：A, C, D
My sister was very unhappy for _______ to the party.
A．having not been invited
B．not having invited
C．having not invited
D．not having been invited
过敏性紫癜患儿的皮肤紫癜多见于
A．头面部B．颈部、上肢C．腹部D．躯干部E．下肢及臀部
