下列哪组药物不是温经汤的组成

A．人参、阿胶

B．吴茱萸、芍药

C．肉桂、丹参

D．半夏、麦冬

E．川芎、当归

Why does the author mention genetic engineering and computer science

A．To compare them with the new materials.

B．To show the significance of the new materials on the future world.

C．To compare the new materials to them.

D．To explain his viewpoint.