热水罐的出水温度的控制范围为（）℃。
A.50～60
B.40～50
C.30～40
D.70～80
参考答案：A
You can take as many books as you like here for they are free of ________. [ ]
A. fare
B. charge
C. money
D. pay
|x|2-2|x|-15＞0的解集是______．
