下列词语的书写完全正确的一项是（    ）

材料一：“互联网十回收”在创造经济效益的同时，也让循环经济理念深入人心。在北京市某地铁站，高女士将自己手中的空矿泉水瓶投进某公司设在站口的“饮料瓶回收机”中，机器屏幕上显示该瓶的品类，并提示高女士“您投入的是第5977458个瓶子”。随后，在“手机话费、一卡通充值、优惠券”等“返利”方式中，高女士选择了“手机话费”，在输入自己的手机号码后0.1元就到账了。饮料瓶回收后，会实现“瓶到瓶的循环”，即从智能回收、专业分拣打包到深层清洗净化，生成再生食品级聚酯切片，这些切片可加工为再生瓶，进入市场流通。

材料二：“互联网十政治”为公民参与政治生活提供了广阔的平台，也给社会治理模式的创新带来了新的机遇。公民通过社交网络为交管部门提供道路拥堵信息；民间环保组织依据政府公开的环境数据绘制“污染地图”，帮助政府监管污染企业；市政府通过门户网站向市民征集建议；城管部门请商户和市民通过网络平台为执法人员的工作打分……公民与政府通过“互联网+”在越来越多的社会公共领域中形成合力。

材料三  “再不创业就老了！”凭着对互联网新技术的敏感和青春的激情，越来越多的年轻人加入“互联网+”创业的大军。对于这些年轻人来说，进行“互联网+”创业，最难的可能并不是“互联网”的这一部分，“+”号后面的那部分以及怎么“+”或许才是更难搞定的。

HOLIDAY FUN AT THE POWERHOUSE

    Join in the holiday fun at the powerhouse this month linked to our new exhibition , Evolution & Revolution : Chinese dress 1700s to now . DON'T FORGET out other special event , the Club Med Circus School which is part of the Circus ! 150 years of circus in Australia exhibition experience !

◆ Chinese Folk Dancing : Colorful Chinese dance and musical performances by The Chinese Folk Dancing School of Sydney . Dances include : the Golden stick dance and the Chinese drum dance . A feature will be the Qin dynasty Emperor's court dance . Also included is a show of face painting for Beijing opera performances .

Sunday 29 June and Wednesday 2 July in the Turbine Hall , at 11:30 am & 1:30 pm.

◆ Australian Chinese Children's Arts Theatre : Well-known children's play experts from Shanghai lead this dynamic youth group . Performances include Chinese fairy tales and plays .

Thursday 3 to Sunday 6 July in the Turbine Hall , at 11:30 am & 1:30 pm .

◆ Chinese Youth League : A traditional performing arts group featuring performance highlights such as the Red scarf and Spring flower dances , and a musician playing Er Hu .

Sunday 6 to Tuesday 8 July in the Turbine Hall , 11:30 am to 1:30 pm .

◆ Kids Activity : Make a Paper Horse : Young children make a paper horse cut-out . ( The horse is a frequent theme in Chinese painting , indicating a kind of advancement . ) Suitable for ages 8-12 years .

Sunday 28 June to Tuesday 8 July in the Turbine Hall , 12:00 pm to 1:00 pm .

◆ Club Med Circus School : Learn circus skills , including the trapeze , trampolining and magic . Note only for children over 5 : There are 40 places available in each 1 hour session and these must be booked at the front desk , level 4 , on the day .

Tuesday 1 to Saturday 5 July at 11:30 am & 1:00 pm .

Enjoy unlimited free visits and many other benefits by becoming a family member of the Powerhouse . Our family memberships cover two adults and all children under the age of 16 years at the one address .

    Members receive Powerline , our monthly magazine , discounts in the shops and the restaurants , as well as free admission to the Museum . All this for as little as $50.00 a year ! Call (02)9217 0600 for more details .

已知直角梯形的上底和下底长分别为1和2，较短腰长为1，若以较长的底为旋转轴将该梯形旋转一周，则该旋转体的体积为(      )