环氧乙烷分析取样的正确方法是（）。

A、直接用不锈钢瓶取

B、先把不锈钢瓶接上，循环一段时间，再取样

C、先打开取样阀排放，再取样

D、取好样以后先取下钢瓶再关阀

Firms claiming compliance with the GIPS Standards are least likely to be required to:()

A. undertake a verification process.

B. provide a composite list and description to any prospective client on request.

C. document their policies and procedures used in establishing and maintaining compliance.