欧洲联盟属于经济一体化形式中的（）
A.国际经济组织
B.自由贸易区
C.关税同盟
D.地区经济集团
参考答案：D
— I telephoned him twice and I couldn't get through to him.
— I think that the line might have been out of order, ______? [ ]
A. don't you
B. wasn't it
C. do you
D. hadn't it
世界各国受英、法两国警察制度的影响，形成了哪两种警政管理体制( )
A．地方自治制
B．复合管理体制
C．中央集权制
D．地方分权制
