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The linguistic markers that characterize individual social groups may serve as social markers of group membership.
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发布时间：2022-01-07
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第1题
Dress, and particularly the jersey, has always been important during the history of the Tour de France. The rider who is leading the mountain portion always wears a ____ jersey.
第3题
The newly launched pension policy has been a major bone of in the city's current fiscal problems.
第4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 (immediate and extended), tribal group and even an entire population. Molecular Genealogy (宗谱学) can use this unique identification provided by the genetic markers to link people together into family trees. Pedigrees (家谱) based on such genetic markers can mean a breakthrough for family trees where information is incomplete or missing due to adoption, illegitimacy or lack of records. There are many communities and populations which have lost precious records due to tragic events such as the fire in the Irish courts during Civil War in 1921 or American slaves for whom many records were never kept in the first place.
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The main objective of the Molecular Genealogy Research Group is to build a database containing over 100,000 DNA samples from individuals all over the world. These individuals will have provided a pedigree chart of at least four generations and a small blood sample. Once the database has enough samples to represent the world genetic make-up, it will eventually help in solving many issues regarding genealogies that could not be done by relying only on traditional written records. Theoretically, any individual will someday be able to trace his or her family origins through this database.
In the meantime, as the database is being created, molecular genealogy can already verify possible or suspected relationships between individuals. “For example, if two men sharing the same last name believe that they are related, but no written record proves this relationship, we can verify this possibility by collecting a sample of DNA from both and looking for common markers (in this case we can look primarily at the Y chromosome(染色体)),” explains Ugo A．Perego, a member of the BYU Molecular Genealogy research team.
People in a large area may possess the same DNA thread because______.
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
第5题
On the template strand that has a 3’ end behind the moving fork, DNA polymerase can synthesize DNA continuously.
第6题
Language use varies from one speech community to another, from one regional group to another, from one social group to another, and even from one individual to another.
第7题
Which of the following principle is not the rules that speakers should obey.
A、Say what you want to say.
B、When in Rome do as the Romans do.
C、Put yourself in others’ shoes
D、One culture’s meat is another culture’s poison
第8题
Language as a means of social communication is a homogeneous system with a homogeneous group of speakers.
第10题
The kind of name or term speakers use to call or refer to someone may indicate something of their social relationship to or personal feelings about that individual.
