The devices could be used as protection mechanisms so the radiation emitted from mobile phones does not penetrate electronic equipment.It is guided around it.“It is very likely that the demonstration for radar would come first and very soon.To go into the visual will take some time but it is also not so far off，”Leonhardt said.

　　1．From the text we can see ______.

　　A．you can be invisible by taking some medicine

　　B．you can be invisible by wearing certain clothes

　　C．Dr Ulf Leonhardt knows how to be invisible

　　D．the Invisible Woman is a character in Fantastic Four

　　2．How does invisibility happen according to Dr Ulf Leonhardt?

　　A．The objects disappear secretly by itself.

　　B．By making the light come from the scenery behind.

　　C．By curving space around the object to bend light.

　　D．In fact，the object or person is not there.

　　3．The devices could be used to ______.

　　A．reduce the radiation from mobile phones on electronic equipment

　　B．increase the radiation from mobile phones on electronic equipment

　　C．stop the radiation from mobile phones on electronic equipment

　　D．get rid of the radiation from mobile phones on electronic equipment

　　4．According to the passage，invisibility ______.

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