氢气是未来最理想的能源，科学家最近研制出利用太阳能产生激光，并在二氧化钛（TiO₂）表面作用使海水分解得到氢气的新技术2H₂O 2H₂↑+O₂↑．制得的氢气可用于燃料电池．试回答下列问题：

（1）分解海水时，二氧化钛的作用是____ 生成的氢气用于燃料电池时，____ 能转变为____ 能；分解海水的反应属于____ 反应（填“放热”或“吸热”）．

（2）某种氢氧燃料电池是用固体金属氧化物陶瓷作电解质，两极上发生的电极反应为：

A极：H₂+O^2﹣﹣2e^﹣=H₂O，B极：O₂+4e^﹣=2O^2﹣．

则A极是电池的____ 极，电子从该极____ （填“流入”或“流出”）．

    2017年5月8日，***上海市第十一次代表大会隆重开幕。大会报告中指出，上海未来五年要成为人文之城：建筑是可以阅读的，街区是适合漫步的，公园是最宜休憩的，城市始终是有温度的。“有温度”这个有着细腻感觉的词语，此后逐渐流行开来。它的意思是让人感受到热度、暖意，含义由物理层面扩展到了人文层面。近日，《咬文嚼字》编辑部将“有溫度”列入了“2017年十大流行语”。

    你对“有温度”这一词语是如何理解的？请联系生活实际，谈谈你的思考、联想或感悟。要求立意自定，文体明确，标题自拟；不要套作，不得抄袭；不少于800字。

    While waiting for my daughter I treated myself with a coffee which I used to be so dependent on that when I stopped it I had headache for days. So while I was enjoying my rate moment, I was attracted by an old men who seemed not well

    I could not see his face to be sure, as it was laid between his folded arms on the table. He had a long warm coat, and a big backpack which made me think he could be a homeless. I quit wondering, went to his table, patted him on the arm and asked him, “Are you OK?” He raised his head and said something in a whisper, nodding yes. I realized by the strong smell that he was indeed a homeless man.

    I asked him if he was hungry. He responded but I could not understand his answer. However, I didn't give up and asked him if he would like some rice balls at which he raised his head saying clearly this time that he would be thankful for a rice bait Immediately I went to the nearest shop and bought a drink and a warm lunch box, and brought them to him. He said “thank you” but didn't eat right away and made no move, maybe because he was a little shy in the presence of a lady.

    So I left them on his table and changed my waiting place. When I passed again nearby, he was eating. You should have sensed my great pleasure. I was so grateful that I had the ways to help an old man even if only for a moment of his life.