单项选择题

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
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单项选择题
What is the author of the passage trying to tell the readers
A．Killers hardly ever seek forgiveness from their victims (牺牲品).
B．People can always justify whatever they have done wrong.
C．Boll and his wife take great pride in the success of the Manhattan Project.
D．Victory in war will never be gained without paying the price.
单项选择题
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
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