什么是root and stem; root and stem名词解释定义是什么?

名词解释什么是suprasegmental features; suprasegmental features名词解释定义是什么?

名词解释什么是general linguistics; general linguistics名词解释定义是什么?

单项选择题The semantic components of the word “gentleman” can be expressed as（）.

A.+animate，+male，+human，-adult
B.+animate，+male，+human，+adult
C.+animate，-male，+human，-adult
D.+animate，-male，+human，+adult

单项选择题（）deals with the way in which a language varies through geographical space.

A.Linguistic geography
B.Lexicology
C.Lexicography
D.Sociolinguistics

单项选择题The most recognizable differences between American English and British English are in（）and vocabulary.

A.usage
B.grammar
C.pronunciation
D.structure