下列四项中,电子邮件地址合法的是( )。 A: hour-em. Hxing. com. cn . B: em. hxing. com, cn-zhou C: em. hxing. com. cn@ zhou D: zhou@em. Hxing. com. cn

(3） 以下（ )MX记录书写正确。A. MX 10. mail. domain.com A: MX 10. mail. domain.com B: MX mail. domain. com C: MX 10 mail. domain. com D: MX 10 mail. domain. com.

A．www. chinadaily.com.B．www.sins.com.C．www.sohu.com.D．www. Netease. com. A: www. chinadaily.com. B: www.sins.com. C: www.sohu.com. D: www. Netease. com.

域名ABC. Xr2. com. CN中主机名是__

When you google online store, the first result that _____is Amazon. com.

Who will offer daily video clips to Yahoo Inc.'s news website A: ABC News and CNN. com. B: Yahoo Inc.'s news reporters. C: CNN. com. D: ABC News.

--Do you have ______ e-mail address--Yes, it’s rong@ 163. com. A: a B: the C: any

Com in COM Port means ______________.

下列模块属于MS-DOS核心部分的是（） A: IBMBI B: COM     C: IBMDI D: COM         E: FORMA F: COM  G: IBMDO H: COM      I: COMMAN J: COM      K: XCOP L: COM

在Windows中查找扩展名为.COM与.EXE的文件,应在"查找"对话框输入( )。 A: *.EXE*.COM B: *.EXE/*.COM C: *.EXE *.COM D: *.EXE,*.COM