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  3. Scientists and experts have proved that the pattern of a human being’s finger sk

Scientists and experts have proved that the pattern of a human being’s finger sk

游客2024-07-21  39
问题 Scientists and experts have proved that the pattern of a human being’s finger skin______. [br] finger-prints have often been used as a method of solving criminal case because it ______.
选项 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
答案 B
解析 细节理解题。从第三段第四句Because of the simplicity and economy of this system可知“指纹鉴别的方法简单而且经济”。
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