9=32=3;
3-82=3-64=-4;
3216=363=6,即平方根为±6.
故答案为:±6.
下面几组数中,不相等的是[ ]
A、-3和+(-3)
B、-5和-(+5)
C、-7和-(-7)
D、+2和│-2│
---_______ is it from your home to the centre of the town?
---Only 10 minutes on foot.
A.How often
B.How soon
C.How far
D.How many