题型:阅读理解 题类:常考题 难易度:普通
北师大版高中英语高二下册模块7 Unit 19同步练习1
The Uniqueness of Finger-prints (指纹的唯一性)
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 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 by recorded easily. With special methods, identification 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.
Choose the best answers according to the above:
Welcome to our school. You can do a lot of things here. Come and join us.
Timetable | |
Sunday 8:30—11:30 Personal Inventions You can see many inventions by the students; you may also bring your own inventions. | Monday 19:00—21:00 Space and Man Dr. Thomas West If you want to know more about the universe. |
Wednesday 19:30—21:00 Modern Medicine Mrs. Lucy Green Would you like to know medical science? | Friday 18:30—21:00 Computer Science Mr. Harry Morison from Harvard University Learn to use Windows XP. |
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