---- Would you mind _______ a few questions about caring for hair ?

---- ________________ .

A．to answer, please don’t

B．answering, Certainly not

C．to answer, Of course not

D．answering, At all

肝硬变病人蛋白电泳出现我B-r桥，多是由何种免疫球蛋白增加所致

A．IgA

B．IgM

C．IgG

D．IgE

E．IgD