Biological Identification Technologies When a person walks，the movement of his head，trunk，hipbones and limbs are all reflected in changes in his body．A computer_____（1）these changes into a database．later，the computers can_____（2）identify him according to these changes．This is a new biological identification method and it can quickly identify an examinee_____（3）disturbing him．It's especially Suitable for use in airports and supermarkets． Everybody ’s voice is_____（4）．When a person ’s voice is recorded by an instrument，its voice frequency spectrum is called his sound print．Like a fingerprint，everybody’s sound print is different．How can computers_____（5）his sound? First，his voice is recorded，which allows the computers to become familiar with his voice．It will then turn his sound characteristics into a_____（6）of digits．These digits represent the frequency，pitch and rhythm of the person’s voice. These are the_____（7）on which the computers can distinguish his voice from_____（8）． When that person needs to be identified，after he says only one word or two，the computers can identify him．The computer can even identify sounds coming_____（9）the wires．This will provide a_____（10）guarantee to electric banks and electric purchases. We often bring ID cards．work cards，or driver licenses with us to prove our identity．If all these cards are forgotten or lost，how can we prove_____（11）we are ?In fact，it ’s not difficult to prove whom you are，because your body_____（12）has identifying markers．Some are physiological features．such as fingerprints，sounds，facial types and eye color．The computer can help to identify you．Suppose your features have already been stored in the database．To identify you，we have to take your picture with a camera and send it to a computer for_____（13）．First，the computer needs to reposition this picture according to the position of your eyes4，and then starts to read the message of your physiological features such as the_____（14）of your pupil5 to the whites of your eyes6 and the shade of his nose．Next，it seeks matching records from the database．Finally，it makes a_____（15）． 第 31 题