There is no doubt _______ international cooperation is the key to _______ with cyber crime.

A．whether; doing

B．that; dealing

C．whether; do

D．that; deal

B淋巴细胞表面存在（）

A.MHCⅠ类抗原

B.MHCⅡ类抗原

C.MHCI、Ⅱ类抗原

D.HLA-B27

E.HLA-Ⅲ类抗原