木制船桨
参考答案:29(4421.9090)
已知函数f(x)满足f(1)=1,对于任意的实数x,y都满足f(x+y)=f(x)+f(y)+2(x+y)+1,若x∈N*,则函数f(x)的解析式为( )
A.f(x)=4x2-4x+1
B.f(x)=4x2+1
C.f(x)=x2-5x-5
D.f(x)=x2+3x-3
—I'm going to London with my parents for my holiday.
—Really? ________. [ ]
A. Thank you
B. I'd like to
C. Have a good time
D. Not at all