Thanks to the timely treatment, the patient _______ people all thought would die slowly recovered.

A．which

B．whom

C．who

D．as

当分泌物中IgA缺陷时，哪种免疫球蛋白可结合分泌片替代IgA（）

A.IgE

B.IgG

C.IgD

D.IgM

E.IgA