Every human being has a uniquearrangement of the skin on his fingers and this ar

Every human being has a unique(唯一的，独特的)arrangement of the skin on his fingers and this arrangement is unchangeable. 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 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. It is only when the inner skin is injured that the arrangement will be destroyed. 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. With special methods, identification(辩认，鉴定)can be achieved successfully within a short time. 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. His finger-prints can prove who he is even if his appearance has been changed by age or accident.

When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye. Special techniques are used to “develop” them. Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

Scientists and experts have proved that the pattern of a human being’s finger skin ________.

A. is similar to his mother’s

B. is valuable to himself only

C. is like that of others with the same type of blood

D. is different from that of all others

If your fingers are wounded by knife, fire or other means, the structure of skin will ________.

A. be changed partly                                  B. be replaced by a different one

C. be the same when the wound is recovered      D. become ugly

Some criminals remove their own finger-prints by ________.

A. using printer’s ink      B. injuring the inner skin

C. damaging the outer skin   D. damaging the colour

Finger-prints have often been used as a method of solving criminal case because it ________.

A. is complicated but reliable   B. is simple and not expensive

C. is expensive but easy to do   D. can bring a lot of money

试题答案

【小题1】D

【小题2】C

【小题3】B

【小题4】B

解析:

【小题1】根据文中第第一段第一句可知答案选D。

【小题2】 根据第二段第一句可知答案选C，人的手指皮肤结构不会随着长大或表面受到伤害而发上变化。

【小题3】根据文中第二段It is only when the inner skin is injured that the arrangement will be destroyed.可知仅仅通过内部皮肤受到伤害才会改变指纹，所以犯人就采用这种方式来改变他的指纹，不过非常危险。

【小题4】根据文中倒数第二段中Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case这句可知答案选择B