问题
选择题
下列物质中，不能做漂白剂的是[ ]
A．SO2
B．Ca(ClO)2
C．NaClO
D．H2SO4
答案
答案：D
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下列物质中，不能做漂白剂的是[ ]
A．SO2
B．Ca(ClO)2
C．NaClO
D．H2SO4
答案：D
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| In reallife, robots are mainly used in factories. They do many different jobs. Usually these jobs are too 1 , difficult or boring for humans. Robots also help disabled people and people who cannot look after 2 . For example, scientists are making a robot to help 3 people. Now many of them have a dog to help them. The dog is called a guide dog. In the future, guide dogs might be robot dogs. One robot dog is called Meldog. It has wheels. It usually "walks" 4 its owner. It is very clever. It knows the speed of its owner's walk. Meldog talks to its owner by 5 . The owner wears a special belt. This belt 6 instructions to the owner from Meldog such as "Stop here","Turn left" and"Turn right". In the United States, another 7 of robot helps disabled workers. This robot, called Kilroy, helps disabled computer operators. The robot 8 the sound of its owner's voice. It follows instructions such as "Turn the page" and"Make a cup of coffee". Robots are also used in American 9 . They can do simple jobs. For example, they shave (刮脸) patients and brush their teeth and take meals from the kitchen to patients' rooms. It never gets lost 10 this robot has a map of the hospital in its computer memory. | ||||
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