The policeman caught hold of the thief and hit him ____the head．

A．in the

B．on his

C．on the

D．in his

下列哪项是确诊系统性红斑狼疮和判断活动性有参考价值的标记性抗体()

A．抗SSA(Ro)抗体

B．抗RNP抗体

C．抗Sm抗体

D．抗dsDNA抗体

E．抗磷脂抗体