植物的任何部位都能进行[ ]

A．呼吸作用和光合作用

B．光合作用

C．呼吸作用

D．以上三项均不对

In modern linguistics, speech is regarded as more basic than writing, because （）

A.in linguistic evolution, speech is prior to writing

B.speech plays a greater role than writing in terms of the amount of information conveyed

C.speech is always the way in which every native speaker acquires his mother tongue

D.All of the above