Service robot superstars shine at conference，aim to make life easier

    At the 2017 World Robot Conference, service robots were the stars．They work most closely with people．They help to do different jobs in daily life．

    Teotronice

    Teotronice is a music teacher．He looks like the famous ET, but his 53 fingers make him play the piano well．He played John Lennon's song Imagine at the conference．

    The supermarket robot

    Are you tired of shopping in the supermarket? Now，it becomes much easier with the help of the robot．You just talk to it，and then it will lead you to the things you need to buy．You can also use the robot to pay for your items．

    Bestic

    Bestic acts as a human arm to feed people with a spoon．This robot can be a good helper for kids，the elderly and those with difficulty using their hands．

假如你生活在春秋战国时期，下列哪件事情不可能发生（    ）

填入下面横线处的句子，与上下文衔接最恰当的一项是（    ）
尼采把梦和醉看作两种基本的艺术状态。除梦之外，酒与艺术也有不解之缘。                 。那么，酒只是工具，只要能达于醉的状态，没有酒也可。天下酒徒未必都是艺术家，大艺术家往往无酒而常醉。
①曹操“对酒当歌”，李白“斗酒诗百篇”，欧阳修自号“醉翁”
②醉打破日常生活的藩篱，使人与山水相融合，与宇宙相融合
③中国文人中多爱酒之人
④不过，正如欧阳修所说：“醉翁之意不在酒，在乎山水之间也。”

（Ⅰ）当a∈1，e²时，讨论函数f（x）的零点的个数；

（Ⅱ）令g（x）=tx²﹣4x+1，t∈﹣2，2，当a∈1，e时，证明：对任意的 $x_1\in 1，\sqrt{e}$ ，存在x₂∈0，1，使得f（x₁）=g（x₂）．