1.Robots， becoming increasinglyprevalent in factories and industrial plants throughout the developed world， are programmed and engineered to perform industrial tasks without human intervention.
2.Most of today‘s robots are employed in the automotive industry， where they are programmed to take over such jobs as welding and spray painting automobile and truck bodies.
3.They also load and unload hot， heavy metal forms used in machines casting automobile and truck frames.
4.Robots， already taking over human tasks in the automotive field， are beginning to be seen，
5.The robots used in nuclear power plants handle the radioactive materials， preventing human personnel from being exposed to radiation.
6.Robots differ from automatic machines in that after completion of one specific task， they can be reprogrammed by a computer to do another one.
7.As an example， a robot doing spot welding one month can be reprogrammed and switched to spray painting the next.
8.With the ability to “see”， robots can identify and inspect one specific class of objects out of a stack of different kinds of materials.
9.When light from an object such as a machine part strikes the camera， the sensitive materials measure the intensity of light and convert the light rays into a range of numbers.
10.It is not yet known whether robots will one day have vision as good as human vision.
11.Engineers working on other advances are designing and experimenting with new types of metal hands and fingers， giving robots a sense of touch.
12.These future robots， assembled with a sense of touch and ability to see and make decisions， will have plenty of work to do.
13.They can be used to explore for minerals on the ocean floor or deep areas of mines too dangerous for humans to enter.
Text B Predicting Earthquakes
Ⅰ New Words
1.earthquake n. 地震
2.warning n. 警告；警报
3.forecast vt. 1.预测，预报；2.预示
Eg： They forecast a large drop in unemployment over the next two years.
Snow has been forecast for tonight. 预报今晚有雪。
同义词：predict v. 预测，预言（参见Unit 1 生词）
4.giant n. 1.巨人；2.巨物，巨大的动物
5.shift vt./vi. 替换；转移
[同义词] switch 、change
6.fault n. 1.缺点，毛病；2.错误，过失；
7.seismic a. [地]断层，地震的
8.precede vt. 先于…，比…优先