The computer,        help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20^th century.

A．which

B．whose

C．with its

D．with whose

为哺乳动物红细胞生理活动提供所需能量的主要途径是（）

A.糖酵解途径

B.2，3-二磷酸甘油酸支路

C.柠檬酸循环

D.糖醛酸循环

E.磷酸戊糖途径