When _____ different cultures, we often pay attention only to the differences without noticing the similarities. [ ]

A. compared

B. being compared

C. comparing

D. to compare

建设单位自行完成的勘察设计工作所需的费用计入( )中。

A．建设单位管理费

B．研究试验费

C．勘察设计费

D．工程监理费