1. In what year did the World Expo first have a theme?A. 1851 B. 1933C. 1970 D. 20002. Which of the following is NOT an invention (发明) that has been shown at a World’s Fair?
中报二十一世纪(北京)传媒科技有限公司版权所有,未经书面授权,禁止转载或建立镜像。 主办单位:中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 网站信息网络传播视听节目许可证0108263 京ICP备2024066071号-1京公网安备 11010502033664号