The skyscrapers (摩天大楼), most of which have large glass windows, have led to a great need for window cleaners. Window cleaners can earn as much as $35 an hour through the job, but accidents sometimes happen. Luckily, the dangerous work may soon be done by Ozmo, an intelligent window-cleaning robot.
Ozmo, like human window cleaners, also uses brushes and its arms to clean the dirt on the glass windows. A 3D map of the building programmed into its system allows the robot to skillfully move up and down. Computer vision and touch sensors (传感器) enable it to move out of the way when a window opens suddenly.
Unlike human window cleaners, Ozmo does not require soap to clean the glass windows. It only uses pure water to do the job, so it is environmentally friendly.
While it takes three human window cleaners 480 hours to clean the windows of a 40-story building, Ozmo can finish the work in just 80 hours. Moreover, unlike other robots, Ozmo will not replace human window workers. It only make them safer. They will control it on the ground.
Whether Ozmo, which is still being tested, can finish the work as well as human window cleaners remains to be seen. Past experiences of using robots to do the work were disappointing, because the robots didn’t have the same eyes as humans and they often missed the soot (烟灰) on the corners of windows.
【小题1】The second paragraph mainly tells us ________.| A．how Ozmo cleans glass windows smartly |
| B．what makes Ozmo a popular robot |
| C．why Ozmo does its job slowly |
| D．why Ozmo is more interesting than human window cleaners |
| A．Computers. | B．Soap. | C．Soot. | D．Pure water. |
| A．1360 | B．970 | C．520 | D．400 |
| A．Ozmo will take the place of human window cleaners. |
| B．Ozmo can help human window cleaners do their work safely. |
| C．As an intelligent window-cleaning robot, Ozmo is successful. |
| D．Ozmo does harm to the environment while cleaning windows. |
