2. 考研
  3. Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselve

Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselve

admin2005-06-26  73
问题     Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselves off and on again when you return. You will choose the temperature for each room, the lighting and the humidity. A sensor will detect the presence of a human(and, with luck, ignore the dog!)and turn the systems on, and when the humans leave it will turn them off again.
    The sensors will work through the central computer, and they will do much more than just turn the fires and lights on and off for you. They will detect faulty electrical appliances, plugs or switches, isolate them so that they cannot harm anyone, and then warn you that they need repair. They will detect fire and if you are out of the house, the computer will call the fire brigade. It will also call the police should the sensors detect an intruder. This will not be too difficult because the locks on the outside doors will be electronic. You will open them using your personal card—the one you use for shopping—maybe using a number known only to you.
    It will be impossible to lose the key, and a housebreaker will have to tamper(拨弄)with the lock or with a window. It is not very difficult to make such tampering send a signal to the computer.
    The computer will be more than a fireman-policeman-servant. It will be an entertainer, and most of your entertainment will come right into your home. It does now, of course, but by 2040 "entertainment" will mean much more. For one thing, you will be able to take part actively, rather than just watching.
The best title for the passage might be______.
选项 A、Life at Home in the Year 2040
B、Sensors and Computers
C、The Development of Science and Technology
D、Lights and Heaters in the Year 2040
答案A
解析 通过阅读文章中可知四个选项在文中都出现过，要选出适合文章标题的选项需要掌握文章的主旨，也就是作者写这篇文章所要表达的意思。从文章第一段我们可以看出作者通过电灯和加热器，来告诉我们到2040年时，它们将会自动开闭，并且可以为我们的房间设定温度、亮度和湿度；第二、三段讲到了传感器，它们使得我们的生活更安全、更方便。第四段讲到了电脑为我们带来更多的家庭娱乐活动。可见，作者最想要表达的是我们未来的家庭生活。A项符合文章意思。B、C、D项是作者为了要表达文章的主旨用到的例子，所以都不能表达中心意思，因此本题的正确答案为A。
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