Finger­prints can be made very easily with printer's ink. They can by recorded easily. __3__ Because of the simplicity and economy of this system, finger­prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. __4__

　　When a suspect leaves finger­prints behind at the scene of a crime, they are difficult to detect with the naked eye.

　　__5__ Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

　　A．Special techniques are used to “develop” them.

　　B．A fingerprint is an impression of the friction ridges of all part of the finger.

　　C．It is only when the inner skin is injured that the arrangement will be destroyed.

　　D．With special methods, identification can be achieved successfully within a short time.

　　E．A latent print is the chance reproduction of the friction ridges deposited on the surface of an item.

　　F．His finger­prints can prove who he is even if his appearance has been changed by age or accident.

　　G．Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable.

　　答案：GCDFA

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