When a speech sound changes and becomes more like another sound that f

When a speech sound changes and becomes more like another sound that follows or precedes it, it is said to be______

nasalized

voiced

aspirated

assimilated

答案及解析：D选项，assimilated同化：一个音通过吸收其相邻音的特点，变得与其相似，这种音系规则叫做同化。综上，D选项正确。A选项，nasalized鼻音化，元音后紧跟一个鼻音时, 该元音要鼻音化。如bean/ green 中的[i:]音。元音的音同时经过口腔,鼻腔发出,会有些改变,而后面的鼻音几乎就没有发出来，不合题意，故排除。B选项，voiced 浊音的，不合题意，故排除。 C选项，aspirated 送气的，不合题意，故排除。故正确选项为D。