题干
—Do you know _____?
— Next month.
A：when he will come here
B：when did he come here
C：when he came here
D：when will he come here
答案(点此获取答案解析）
A
，当x>2时，f(x)单调递增，如果x1＋x2<4，且(x1－2)(x2－2)<0，则f(x1)＋f(x2)的值( )