【单选题】阅读材料,回答题。 We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA strand which can relate an individual to his or her family ( imme...
A.
DNA is characteristic of a region
B.
they are beyond doubt of common ancestry
C.
DNA strand has the ability to identify individuals
D.
their unique identification can be provided via DNA
【简答题】Industrial safe operation has long been a matter of considerable concern of our government. Hove-ever, the occurrence of accidents, especially of death accidents is still increasing in the past five y...