____ to teaching, as we know, contributes to his popularity with his students.

A．To devote

B．Devoted

C．Being devoted

D．Devoting

以下哪种为免疫复合物型肾小球疾病

A．微小病变

B．糖尿病肾病

C．IｇA肾病

D．急进性肾炎I型

E．肾淀粉样变