We refer to the limited range of sounds as the phonic medium of language and individual sounds within that range as ______.
正确答案： D
本题解析：
在语言交际中占有一席之地、由人类的发音器官所发出来的声音在数量上是有限的。这些范围有限，但对人类交际活动意义重大、对语言学研究价值不菲的声音就是语言的音响媒介，凡是在这个范 围内的每个单个的声音都叫做语音。
Empirical studies show that the process of SLA is a process of constructing and modifying rules of communication.
Research findings have shown that language processing centers are situated in a single area of the left hemisphere.
From the sociolinguistic perspective, a speech variety is no more than a dialectal variety of a language.
The division of English into Old English, Middle English, and Modern English is nonconventional and not arbitrary.
Searle's classification of illocutionary acts is based on the classification of performative verbs.
According to the "principles-and-parameters" theory, "principles" refer to highly abstract properties of grammar which are applied to language in general and which generate phrases and at the same time restrain the power of Move a, while "parameters" allow general principles to operate in certain restricted ways, according to which particular grammars of natural languages vary.
Well-arranged sentences are considered grammatical sentences that are formed following a set of syntactic rules.