The Dress That Turns into a Coca Cola Machine 

    This specially designed dress looks like a normal dress，but if you unfold it and cover yourself，you may look like a Coca Cola vending machine（自动售货机）. Because there are many vending machines like that on the street，it must be easy for you to hide．If you feel that someone is following you or there is some danger，you can disappear within five seconds．But don't use it to scare your classmates．That'll be rude.
                                  

    The M-Dress is a nice black dress．It is also a mobile phone．It accepts a standard SIM card and allows the wearer to receive calls without carrying an actual(真实的) phone in their pocket or purse．You just need to bring your hand to your ear when you want to answer a phone call．When you finish talking and release your hand，the call will close．It is fashionable and useful．But it will certainly be an embarrassing moment when your dress rings in public．
  Air Conditioned Jackets 

    You will love these air-cooled jackets in summer time when it is very hot outdoors．The jacket has fans that draw air in．The fan is powered by an inside battery．Now it is possible to spend nearly every second of your day with cool air．

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    他是这所大学里著名教授的____，在学习方法的研究方面具有____的见解，他的许多____都受到了大家____的评价。

2017年5月中国将在北京主办“一带一路”国际合作高峰论坛，共商合作大计，共建合作平台，共享合作成果，为解决当前世界和区域经济面临的问题寻找方案，为实现联动式发展注入新能量，让“一带一路”建设更好造福各国人民。这表明当今时代的主题是（    ）