China is known _____ greatly in terms of its cultural values over the past few years. [ ]

A. to change

B. having changed

C. changing

D. to have changed

关于聚乙二醇性质与应用的错误表述为

A．作溶剂用的聚乙二醇相对分子质量应在400以上

B．聚乙二醇具有极易吸水潮解的性质

C．聚乙二醇可用作软膏基质

D．聚乙二醇可用作混悬剂的助悬剂

E．聚乙二醇可用作片剂包衣增塑剂、致孔剂