The required testing for a specific task has been completed and passed. The customer is not confident of the test and requests an additional modified test, this situation indicates inadequate ______ .

A) control procedures
B) audit review
C) assurance funding
D) quality plan development

培养细胞传代时，通常是（）

A.跟据不同细胞采取不同的方法

B.使用二乙烯四乙酸二钠（EDTA.

C.EDTA与胰蛋白酶按不同比例混合使用

D.悬浮生长的细胞直接添加胰蛋白酶

E.贴壁生长的细胞添加新鲜培养液