10. Whichof the following describes the process in which one's language ability is developed in natural and everyday situation?
Performance
Competence
Learning
Acquisition
本题考查应用语言学。语言习得指的是是在潜意识的情形下自然地获得语言知识和言语技能。与题干中描述的概念一致。考生要注意“习得”与“学习”的概念区分，后者指在课堂中有意识的学习。故本题选D。