第六单元

　　1.常考单词：

　　efficiency increasingly install personnel expose reduction completion specific switch critical intensity scale defective

　　2. 常考词组：

　　in that 　 in question 　 plenty of

　　3. 常考句子：

　　1） 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.

　　2） Robots，already taking over human tasks in the automotive field are beginning to be seen，although　to a lesser degree，in other industries as well.

　　3） The robots used in nuclear power plants handle the radioactive materials，preventing human personnel from being exposed to radiation.

　　4） Robots differ from automatic machines in that after completion of one specific task，they can be reprogrammed by a computer to do another one.

　　5） Engineers skilled in microelectronics and computer technology are developing artificial vision for robots.

　　6） With the ability to “see”，robots can identify and inspect one specific class of objects out of a stack of different kinds of materials.

　　7） Anyone wanting to understand the industry of the future will have to know about robotics.