Sun Yang,＿Olympic and world swimming champion of China, has received＿ indefinite ban from competition following his seven-day detention for driving without a license.

A．the; an

B．an;／

C．an; the

D．the;／

HLA基因复合体中等位基因数最多的是

A．HLA-DQ

B．HLA-B

C．HLA-A

D．HIA-DR

E．HLA-C