【简答题】when you switch the computer on, BIOS begins ______
【简答题】80C51的定时器T1用作定时方式且选择模式2时,工作方式控制字为 ______ 。A.TCON=0x60; B.TCON=0x02; C.TMOD=0x06; D.TMOD=0x20;
【简答题】Vision-phones(可视电话) Radio,telephone and television are widely used in the world. When you switch on the radio, you can listen.But when you use a telephone,not only can you listen to others but also yo...