光在哪，神在那。

AThe pronunciation of two distinct phonemes as one, such as /s/ and /Θ/ refers to _____.
(A) conflation 
(B) epenthesis 
(C) fricatives 
(D) plosives 

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(A) conflation 合併

兩個區辨音素/音位作為一個發音

確定是否為音位與否的準則有：一、辨義功能；二、互補分布；三、音感差異

一、辨義功能：<s>、<th> 是能辨義的，sing（唱歌）thing（東西）的意思不同，所以屬於兩個音位。

二、互補分布：

三、音感差異：

(B) Epenthesis 增音

- the insertion of a vowel or a consonant into a word to make its pronunciation easier

- the insertion of a vowel to break up a cluster

(C) Fricatives 擦音

- consonants sounds which are formed by narrowing the vocal tract(管道), causing friction(摩擦) as the air passes through it

(D) Plosives 塞音/爆破音

- consonants made by stopping the air completely then suddenly letting it out

- the tongue, mouth and lips are all used to stop the air and let it out suddenly.