Knowledge and learning are important if we want to be successful, but they may also ______ our

thinking. [ ]

A. direct        

B. limit      

C. change  

D. improve  

企业接受外币资本投资，如果投资协议中有约定汇率，按约定汇率折算资本与按当日汇率折算资本之间的差额，应计入资本公积，并可用于转增资本。 ( )