经过离心机后，聚乙烯湿度大约为多少？
参考答案：
35%（重量百分比）。
_______ book of this writer is East and West.
A．Known to be the best
B．It was the best known
C．Known as the best
D．The best known
民事法律关系是指当事人之间符合民法规范的有民事权利义务内容的社会关系。( )
