设函数f（x）=ax+2，g（x）=a²x²-lnx+2，其中a∈R，x＞0．

（Ⅰ）若a=2，求曲线y=g（x）在点（1，g（1））处的切线方程；

（Ⅱ）是否存在负数a，使f（x）≤g（x）对一切正数x都成立？若存在，求出a的取值范围；若不存在，请说明理由．

The house rent is ____ higher. I get about half the space I had at home but I’ll have to pay _____ here.

A．far less; as much three times 　　　

B．far more; much as three times

C．little; three times as much 　　　

D．much; three times as much