Throughout history, the language________ by a powerful    group spreads across a civilization.        [ ]

A. speaking                        

B. spoken    

C. to speak                        

D. to be spoken

混凝土的抗压强度制作试块的最小尺寸应根据( )而定。

A．混凝土量

B．混凝土强度

C．集料粒径

D．试模