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 distinguish¹ 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 computers can even identify sounds coming     9    the wires. This will provide a     10     guarantee to electric banks and electric purchases.
We often bring ID cards², 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 database³. 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 themessage of your physiological features such as the     14     of your pupil⁵ to the whites of your eyes⁶ and the shape of his nose. Next, it seeks matching records from the database. Finally, it makes a     15    .

A．checks B．stores C．revises D．modifies

A．nearly B．approximately C．roughly D．accurately

A．without B．with C．for D．in

A．hear B．understand C．distinguish D．record

A．othre’s B．another’s C．each other’s D．one another’s

A．at B．on C．in D．through

A．cleverer B．tidier C．smarter D．safer

A．how B．whom C．what D．where

A．oneself B．themselves C．ifself D．himself

A．processing B．copying C．coloring D．revising

A．size B．type C．ratio D．shapr

A．recommendating B．decision C．proposal D．contribution