（）从串口接收缓冲器中将数据读入到变量 temp 中的 C51语句是 ______

A.temp = SCON

B.temp = TCON

C.temp = DPTR

D.temp = SBUF

A.temp = SCON;

B.temp = TCON;

C.temp = DPTR;

D.temp = SBUF;

A.temp = SCON;

B.temp = TCON;

C.temp = DPTR;

D.temp = SBUF;

A.temp=SCON;

B.temp=TCON;

C.temp=DPTR;

D.temp=SBUF;

A.temp = SCON

B.temp = TCON

C.temp = DPTR

D.temp = SBUF

A.temp = SCON

B.temp = TCON

C.temp = DPTR

D.temp = SBUF

A.通过串口发送字节数据0x06

B.从串口接收字节数据0x06

C.从串口发送双字0006H

D.其他选项都不正确

A.temp=~temp ; flag=!flag

B.temp=!temp ; flag=~flag

C.temp=!temp ; flag=!flag

D.temp=~temp ; flag=~flag