题目内容
阅读理解
阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
Most offences (犯罪行为), particularly break - ins, assaults (袭击) and hit - and - run car incidents leave traces such as broken glass, blood, fibres or hairs. All these can be left at the scene of offences, moved to a victim (受害者), carried away by the offender or exchanged when cars knock into each other. Legal medical experts are taught during their training that “every contact leaves a trace,” meaning that the criminal leaves something at the scene of crime. The first stage of any investigation, therefore, is careful examination of the scene and the collection of anything useful found there.
Today's well - equipped lab can help the police use everything they find in their investigation. Taking finger - prints, for example, is still one of the most well - known methods used by the police. However, this matching of fingerprints has been revolutionized by computers. A larger number of fingerprints can now be studied withina much shorter time. The use of various types of radiation makes it possible that even fingerprints left on human skin can now be recognized.
The smallest bit of a man's skin, hair or blood left at the scene of a crime can also be matched to an offender with certainty by using a technique called DNA profiling or finger printing. DNA is a substance present in every cell of the body; and everyone (except twins ) has a special DNA profile. A certain DNA profile can be studied and compared with the DNA profile such as blood, found at the scene of a crime. Careful study of traces left at the scene of a crime is now possible with the electronic microscope. In theory, there are limits to the use of science in law cases. This is encouraging because the forensic pathologists (法医病理学家) say that the most powerful deterrent (威慑) to crimes is not so much the fear of punishment as the certainty of discovery.
1．Which of the following is NOT true according to the passage?
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A．When a car accident takes place, traces of the offending car will be either left in one of the cars or both.
B．In order to collect evidence (证据), the police must investigate the scene of a crime.
C．The theory “every contact leaves a trace” is taught to cheer up the police to carry on different investigations.
D．It is very important to keep the scene of a crime as it was when the crime took place.
2．The computer helps to ________.
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A．study a fingerprint on human skin
B．study or examine bigger fingerprints
C．store more fingerprints
D．match a large number of fingerprints in a much shorter period of time
3．The evidence of the DNA profiles is accepted by the judges because ________.
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A．DNA profile are different from one another (except twins)
B．even twins have different DNA profile
C．it's easy to find the DNA profile at the scene of crime
D．it's impossible to destroy the DNA profile once it is left
4．Which of the following could be used as the best title for this passage?
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A．The Importance of the Fingerprint Study
B．Crimes and Their Traces
C．The Science of the Investigation of a Crime
D．The Development of Forensic Science
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