And there was no evidence of higher schools scores in reading , social studies and signets science .

并且没有阅读，社会研究和科学的更高成绩的证据。

The methods of the exploitation of the signet resources are the ones on the base of the qualities of the stones themselves and the famous persons who used or sculpted the signets .

中酸性陆相火山岩的蚀变岩是印章石的主要资源，以石为名和以人为名是印章石资源开发中的主要途径。