在项目实施阶段,( )应协调处理施工现场周围地下管线和邻近建筑物、构筑物,及有关文物、古树等的保护工作,并承担相应费用。
A.承包商B.咨询工程师C.业主D.政府
参考答案:C
定义在R上的函数f(x)满足f(m+n2)=f(m)+2[f(n)]2,其中m,n∈R,且f(1)≠0.则f(2013)=______.
---Do you still go to school in your mother’s car?
---No, since I started secondary school, I’ve come to school by bike ______.
A.on my own
B.in my own
C.by my own
D.with my won