以下不属于涉外协议管辖必须具备的条件的是：A．限于在合同纠纷或者财产权益纠纷中适用

因工种转换困难所导致的劳动者失业是______。

A．非摩擦性失业

B．摩擦失业

C．周期性失业

D．自愿失业

下列哪项描述符合小儿良性癫痫伴中央颞区棘波（）

A.多在生后2～3岁起病

B.癫痫发作与睡眠关系密切

C.脑电图在中央区、中颞区见典型3Hz棘-慢复合波爆发

D.可伴有智力发育障碍

E.预后良好，多于成年后停止发作

—Why did Miss Wang look so worried when we saw her?

—Because she wondered       .

A．where did the other students go

B．when would the policeman come

C．if her students had survived the earthquake

D．what she will do during the trip

下列不属于公共关系三大要素的是（）。

A.社会组织

B.媒介

C.社会性个人

D.公众