– I hear there will be _____ talk on English study tomorrow morning.

---Do you mean ____  speech our teacher asked us to listen to?

A. a; the   b. the; a   C. the; the     D. a; a

8250除数寄存器的值用于确定通信波特率，它必须在8250初始化时预置，为此，应先把通信线控制寄存器的【 】位(DLAB)置为1，然后将其分别写入高 8位除数寄存器和低8位数寄存器。