Little ____that we were watching his every move, so he seemed to be going his own way in this business.

A．he realized

B．he didn’t realize

C．didn’t realize

D．did he realize

下列哪一种疾病是由于表面受体自身抗体引发的自身免疫性疾病（）

A.自身免疫性血小板减少性紫癜

B.肺出血肾炎综合征

C.重症肌无力

D.IDDM

E.系统性红斑狼疮