--__________ you __________ in this school for more than ten years?
--Yes, I __________ here in 2002.
A:Did; come, came
B:Have; been; came
C:Did; come; have been
D:Have; come; came
— Who is she? — ____. (她是我的妈妈)
已知函数f(x)=x2+(lga+2)x+lgb满足f(﹣1)=﹣2且对于任意x∈R,恒有f(x)≥2x成立.
(1)求实数a,b的值;
(2)解不等式f(x)<x+5.