Question

Cloze test

　　Superman isn’t the only one who can see through solid matter．Researchers in Atlanta, Ga, have invented a radar flashlight that can detect a person’s presence through walls and doors．

　　Radar is 　　1　　 for radio detecting and receiving．The radar flashlight gives 　　2　　 radio waves, some of which are 　　3　　 by solid materials and some of which penetrate(穿透)materials 　　4　　 in thickness from clothing to walls and doors．The penetrating radio waves then bounce off people and objects on the other side of walls and doors and are reflected back through those 　　5　　 to the radar flashlight．

　　To 　　6　　 whether a living person is behind a barrier, the device uses a computer chip to analyze the reflected radio waves．The chip is programmed to 　　7　　 slight variations in radio reflections that indicate a heartbeat or respiration and the process of breathing．

　　“These 　　8　　 make the flashlight potentially useful to police officers in ambush(埋伏)situations and to prison guards doing bed checks,”said Gene Greneker, a researcher at the Georgia Institute of Technology．

　　Other uses for the technology include 　　9　　 people in a room during a hostage situation, based on radar reflections of their movement or breathing, and finding 　　10　　 in the ruins of earthquakes, fires, or accidents．

Answer 1

答案：K,J,F,C,L,G,D,I,A,E