阅读理解。

     根据短文内容,从从短文后的选项中选出能填入空白处的最佳选项.选项中有两项是多余选项。

     _1  Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly

similar pattern is passed on from parents to children, though nobody knows why this is the case.

    The ridge (隆起) structure on a person's fingers does not change with growth and is not affected by

surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by

new one, which bears a reproduction of the original pattern. _2   Some criminals make use of this fact to

remove their own finger-prints but this is a dangerous and rare step to take.

     Finger-prints can be made very easily with printer's ink. They can be recorded easily.  _3  Because of

the simplicity and economy of this system, finger-prints 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

finger-prints 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. This is called a latent print.

F. His finger-prints 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.