Sam has been appointed ______ manager of the engineering department to take ______ place of

George.     [ ]  

A. /; /    

B. the; /      

C. the; the    

D. /; the

马克思主义哲学的直接理论来源是

A．德国古典哲学

B．17世纪英国的唯物主义哲学

C．古代朴素的唯物主义哲学

D．18世纪法国的唯物主义哲学