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  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  120
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.
According to the author, in 2040, new technology______.
选项 A、will turn everything into sensors
B、will free us from the keys we use today
C、will make the locks out of date
D、will eliminate all crimes
答案B
解析 通过第二段我们知道中央电脑不仅可以自动开关、检查故障、提醒维修，还可以防火、防盗、自动报警，并且设有电子门锁，用我们平时的购物卡或仅用一个密码来开门。可见，我们不用现在的钥匙，而是用更加先进、更加安全的卡或密码。所以B正确，C不正确。A项在文中没有提到。第二段中提到“It will also call the police should the sensors detect an intruder．”如果传感器发现了非法入侵者，电脑也会报警。可见，文章讲新技术增强了防盗功能，并没有说会消除犯罪，D项也不对。所以应该选B。
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