以下初始化Date对象正确的有（）
Anew Date()
Bnew Date(milliseconds)
Cnew Date(dateString)
Dnew Date(year,month,day,hour,minutes,seconds,milliseconds)
Anew Date()
Bnew Date(milliseconds)
Cnew Date(dateString)
Dnew Date(year,month,day,hour,minutes,seconds,milliseconds)