I don't want any reward for my help; I gave it          out of friendship.     [ ]

A. properly                      

B. conversely      

C. purely                        

D. strictly

下列有关血浆的功能说法错误的是 [ ]

A．产生红细胞

B．运载红细胞

C．运输养料和废物

D．运载白细胞和血小板