Scientists are developing a new kind of machine to take the place of humans. These machine

Scientists are developing a new kind of machine to take the place of humans. These machines can do jobs in places that are too dangerous for humans. For example, they are being developed to work in nuclear power center, deep under the oceans and in outer space.
John Marrit, a psychologist(心理学家) in Williamsburg Massachusetts, helped develop the new machine. This is how they work. A machine is placed in an area far away from the person who operates it. The person wears special hard hat with television screens and sound equipment. The screens and sound equipment let the person see and hear exactly what the machine is seeing and hearing. Mr. Marrit says this gives the person the feeling of being in the same place as the machine. The idea, he says, is being there without going there. The person uses an electronic control to make the machine move. The machine copies the person’s movements exactly. If the person raises his right arm, the machine raises the right arm, too. This means an expert can do a dangerous job while staying in the safe place. For example, a person can direct the machine to destroy a bomb without going near the bomb himself.
【小题1】The new kind of machine being introduced in the passage is     .A．in existenceB．only an ideaC．being tried outD．being researched and developed【小题2】The machine     .A．follows the person’s orderB．is controlled by a puterC．does exactly what the person doesD．is controlled by a television on the person’s head【小题3】The difference between such a new machine and a robot is that     .A．the new machine is more difficult to make than a robotB．the new machine is more difficult to be controlledC．a robot is controlled by man indirectlyD．a robot can’t be used in places too dangerous or farawayD