_____ weekdays, he often gets up _____ six o'clock. [ ]

A. On, at

B. At, on

C. On, in

D. At, at

HSDPA引入了下列哪些技术（）。

A.自适应调制编码AMC技术

B.混合自动重传HARQ技术

C.快速调度技术

D.16QAM高阶调制技术

E.共享信道技术

F.多载波捆绑技术