DNA fingerprinting is a technique of__________. 查看材料
A. grouping DNA strands into structures
B. segmenting DNA with probes
C. constructing body tissues by enzymes
D. identifying a person by comparing DNAs
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A. finally
B. lonely
C. yet
D. alone
It can be inferred from Paragraph 5 that DNA fingerprinting __________.
A. is costly to the police
B. could be a social issue
C. is the only way to prove innocence
D. has been a profitable business
It can be inferred from the passage that donor heart__________.
A. saved the lives of about 2100 Americans the year before the report
B. will be replaced by self-contained artificial hearts sooner or later
C. are more popular and cheaper than self-contained artificial hearts
D. can help patients survive less than 15 years if they are in good transplant