化学岩是母岩风化后的溶解物质,生物遗体,经长期的一系列化学反应,在特定环境条件下层积所成的岩石。
参考答案:对
当压实度超过碾压设备最大碾压厚度时,应分层铺筑,每层的最小压实厚度为()
A、10cm
B、15cm
C、20cm
D、25cm
Language can be used to refer to contexts removed from the immediate situations of the speaker. This feature is called ()
A.displacement
B.duality
C.flexibility
D.cultural transmission