题干

阅读下列材料,回答问题。

材料:建安元年,曹操在许县试行屯田制度,当年“得谷百万斛”,于是,曹操正式在各地推行《置屯田令》。屯田的主要方式有“军屯”和“民屯”。军屯始于西汉,民屯则是曹操的首创,将闲散的劳动力安置为50人一屯,分配在收归国有的荒废农田上进行耕作,“秋冬习战阵,春夏修田桑”。为保证屯田制度的顺利实施和加强管理,曹操颁布“重(禁)豪强兼并”的法令,禁止豪强兼并土地和控制劳动力,使得“流民归还,关中丰实”。设立了“典农部”,专门管理屯田事务,在地方也设置专门机构来保证屯田的有序实施。大兴水利,治河修渠,构建起科学的灌溉体系,使得“以溉稻田,官民有蓄”。同时,还改进灌溉工具“翻车”和“耧犁”技术。

——摘编自孙金刚、孙晓平《枭雄曹操的经济政策述略》

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When you're not at home, many worries may start to crowd your mind. Did I turn the coffee maker off?

Did I lock the door? With a smart home, you can keep all of these worries off.

A smart home is a home with a communication network. This network connects devices (装置), such as lights and TV sets, and allows them to be controlled from far away through electrical wiring, mobile phone communication or WiFi over the Internet.

More and more people may start to consider owning a smart home, because it makes life much more convenient. It can help keep your room at a certain temperature. It can record what happens inside the home and send the video to your phone. When you are on vacation abroad, you can use a smart home controller to switch on or off the electricity when necessary. Some smart homes can receive a visitor, allowing him to come in and offering him a drink. They can even feed the cat and water the plants.

Besides, smart homes are easy to fix. Most smart home technology and devices are wireless and can be set up with a minimum of tools, using only the guiding information. When a problem appears, you can deal with it yourself without paying a professional.

However, for home-users, the smart home technology is far from perfect. It can be rather expensive to own the technology and the devices. Also, because the smart home system (系统) allows its owner to get home information from anywhere, it leaves the home easy to be attacked by hackers (黑客),who may secretly use or change the information in the system.

Now, many scientists are excited at the future of smart home technology. Imagine being able to get fashion advice from your mirror, or receive food shopping suggestions from your refrigerator, while there are others who worry that those smart devices will make people lazier and lonelier. Whatever it is, one thing is for sure — smart home technology will change the way we live and work.