With the development of modern science and technology you can take your favourite radio

programmes with you on the move and listen     you like．     

A．whenever

B．however

C．whatever

D．whichever

成分输血的优点不包括（）

A.减轻输注全血所致的血液循环负担

B.减少各种免疫抗体的产生

C.减少传染肝炎的机会

D.节约用血，避免浪费

E.减少肺梗塞的发生率