单选题
Every human being has a unique 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【C1】______similar pattern is【C2】______from parents to children, though nobody knows why this is the【C3】______. The ridge(脊) 【C4】______on a person"s fingers does not change with growth and is not affected by superficial injuries. Burns, cuts and other damage to the【C5】______part of the skin will be replaced【C6】______by a new one which bears reproduction of the【C7】______pattern. It is only when the inner skin is injured that the arrangement will be【C8】______. Some criminals make use of this fact to remove their own finger-prints【C9】______this is a dangerous and rare step to【C10】______. Finger-prints(指纹)can be made very easily with printer"s ink. They can be recorded easily. With special methods, 【C11】______can be achieved successfully within a short time. 【C12】______the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal cases. A【C13】______man may deny a charge but this may be【C14】______. His finger-prints can prove who he is even his【C15】______has been changed by age or accident.