2. 外语
  3. In the 1880s it was proved that no two people have exactly same【M1】______ fingerprints. It was further discovered that there are

In the 1880s it was proved that no two people have exactly same【M1】______ fingerprints. It was further discovered that there are

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问题     In the 1880s it was proved that no two people have exactly same【M1】______
fingerprints. It was further discovered that there are four main types of fingerprints.
These four types can be divided to over a thousand smaller groups. In this way fingerprints
【M2】______
can be classified. Therefore fingerprints found at the scene of a crime can be compared with
police records. This comparison used to taking a great deal of time, but now 【M3】______
computers make the task much more easier. 【M4】______
    Fingerprints can be used for crime prevention as good as crime detection. For example,
【M5】______
someone wanting to open a door at a bank places his or her thumb onto a glass plate in 【M6】______
a special machine. The machine then reads the thumb print, and open the door if it 【M7】______
matches one on the list of prints of people permitted to enter. Fingerprints are also invaluable
for identifying unknown innocent people. They may be murder and accident victim. They 【M8】______
may be people whom have been found suffering from amnesia (健忘症). 【M9】______
    A new way of identifying people is by DNA "fingerprinting". DNA is a natural
chemical substance finding in every cell of the human body. The composition of each 【M10】______
person’s DNA is as unique as his or her fingerprints.
【M2】
选项
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