A person’s social backgrounds do not exert a shaping influence on his choice of linguistic features.()
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A lingua franca can only be used within a particular country for communication among groups of people with different linguistic backgrounds.()
The standard language is a better language than nonstandard languages.()
道路交通事故车辆安全技术鉴定的法律依据主要包括中华人民共和国《刑事诉讼法》和()以及公安部《交通事故处理程序规定》等。
为避免缩孔缺陷,应在铸件结构的厚大部位设置冒口或_____。