阅读下列材料，回答问题
材料一：古代史上，日本在亚洲拜认了第一位老师，向老师学习，改革日本的土地、赋税和徭役制度，并废除官职世袭的陋习，建立以天皇为中心的中央集权的国家体制。日本从奴隶社会过渡到封建社会，解放了社会生产力，促进社会经济的发展；但明治维新后不久，日本就对他的第一位老师发动战争，逼老师签订不平等条约，收钱占地。
材料二：由于日本在历史上曾经有过大大规模吸收中国文化，以促进本国文化发展的经验，日本人把移植外来文化视为当然的事情，只要能够适应形势，任何需要的东西都可以从海外引进，既无顾虑也不以为耻。
                                                                                                                                                ——吴于廑、齐世荣《世界史·近代史编》
（1）材料一中“日本在亚洲拜认了第一位老师”是指什么事件？
（2）材料一中“改革日本的土地”具体的措施是什么？这次改革给日本社会带来什么影响？
（3）根据材料二，日本以什么态度对待外来文化？ 
（4）今天的日本是世界经济大国。对比日本的昨天和今天，你认为可以给我国社会主义建设带来哪些启示？

They are_______.

    A machine that takes sweat-laden (浸满汗水的) clothes and turns the sweat into drinking water is in use in Sweden. The machine makes the clothes turn round quickly, heats them to remove the sweat, and then passes the steam through a kind of special material to make purified water.

    Since it has been brought into use, its creators say more than 1000 people have drunk others' “sweat” in Gothenburg. They add the liquid is cleaner than local tap water.

    The device was built for the United Nations' child-focused charity UNICEF to promote a campaign highlighting the fact that 780 million people in the world lack access to clean water.

    The machine was designed and built by the engineer Andreas Hammar, known locally for his appearances on TV tech show “Mekatronik”. He said the key part of the sweat machine was a new water purification part developed by a company named HVR.

    “It uses a technique called membrane distillation (膜蒸馏),” he told the BBC. “We use a special kind of material that only lets steam through but keeps bacteria, salts, clothing fibers and other things out. They have something similar to the International Space Station, but our machine is cheaper to build. The amount of water it produces depends on how sweaty the person is, but one person's T-shirt typically produces 10ml, about a mouthful.”

    The device has been put on show at the Gothia Cup-the world's largest international youth football tournament. Mattias Ronge, chief executive of Stockholm-based advertising agency Deportivo, said the machine had helped raise awareness for UNICEF, but in reality had its limitations.

    “People haven't produced as much sweat as we hoped – right now the weather in Gothenburg is lousy,” Mattias Ronge said. “So we've equipped the machine with exercise bikes and volunteers are cycling like crazy. Even so, the demand for sweat is greater than the supply. And the machine will never be produced in large numbers, since there are better solutions out there such as water purifying pills.”