题目

多角度认识物质的变化，有助于我们更好地理解化学知识。以研究水的组成的反应为例：I．英国科学家卡文迪许等让“易燃空气”（氢气）与氧气在点燃条件下反应得到水。Ⅱ，法国科学家拉瓦锡在研究水的组成实验时，让水蒸气在高温条件下分解得到“易燃空气”。 （1） I中反应所属基本反应类型：。 （2） Ⅱ中反应的化学方程式： 。 （3） I中反应的用途：。 （4） Ⅱ中反应为反应（填“吸热”或“放热”）。 （5） Your House Will Take Care of You In Old Age Have you ever thought what your life would be like in old age? Everyone talks about the “aging” society with large numbers of elderly people needing home care. Now German researchers have set up a “smart” house, programmed to help the elderly live at home with dignity. Scientists at Germany’s Fraunhofer Institute say the house combines existing technology with future-oriented technology. For example, the “smart” bathroom has a touch screen mirror that can remind people to take their medicine, wash their hands or brush their teeth. The hardware behind Fraunhofer’s electronic bathroom is not new, and the software runs on a regular personal computer. When the medicine cabinet is opened, a display in the middle of the mirror tells the person how many pills to take. The mirror is linked to a care provider, who can remotely check whether a patient at home is actually taking medicine and brushing his or her teeth. As many elderly people have arthritic(关节炎的) conditions that make it difficult to operate water taps, the mirror also has displays that turn the water tap on or off or control the water temperature. The bathroom is only the start. Kitchens, bedrooms and all other parts of the “intelligent” home will become “user-friendly” to meet all kinds of individual needs. Sensors in doors, toilets, taps, light switches and carpets detect every activity and record them electronically. Doctors or care staff can see from the computer records what personal hygiene tasks have been completed, how often the elderly person visits the bathroom or uses the toilet. In case of an emergency, the computer automatically alerts the chosen contact person or calls the care center. 1. The ‘smart” bathroom has a touch screen mirror ________. A．that can help the elderly brush their teeth B．which is linked to a nursing house C．behind which is a medicine cabinet D．that can remind people to do many things 2. The underlined word “them” in the last paragraph refers to ________. A．every activity B．doors, toilets, taps, light switches and carpets C．individual needs D．sensors 3.The house mentioned in the passage can be described as _________. A．smart but expensive B．intelligent and convenient C．smart and environmentally-friendly D．fashionable and energy-saving 4. How is the passage mainly developed? A．By inferring B．By listing examples. C．By comparing. D．By introducing a practical method. 5.The author of the text mainly _________. A．calls on people to care for the old B．encourages the old to live with dignity C．introduces a new house D．promotes a new house