行业应用中所使用的手机定位技术中属于手机独立定位的是（）
A.COO
B.TOA
C.A-GPS
D.GPS
参考答案：D
Alan is a careful driver, but he drives ______ of my friends.
A．more carefully
B．the most carefully
C．less carefully
D．the least carefully
冻结单位银行账户的最长期限是多久？
