单项选择题______refers to the abstract lingusitic system shared by all the members of a speech community.
单项选择题Which does NOT belong to the judicial systems provided by the American Federal Government
单项选择题The small-town banking atmosphere is closely related to______.
单项选择题NOT included in the conviction market is______.
单项选择题The description of a language as it changes through time is a______ study.