After determining that a pregnant client is Rh-negative, the physician orders an indirect Coombs'test. What's the purpose of performing this test on a pregnant client

A．To determine the fetal blood Rh factor.

B．To determine the maternal blood Rh factor.

C．To detect maternal antibodies against fetal Rh-positive factor.

D．To detect maternal antibodies against fetal Rh-negative factor.

车刀在刀架上安装位置的高低对切削工作角度无影响。