目前个人计算机中使用的电子器件主要是_________。 ( )

Many boys enjoy _______ football, basketball or baseball

Which do you think is ________, health or wealth？

_______________will not continue if an ongoing operation is changed or deletedA、

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

在Internet域名系统中，.con通常表示______。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

字地址程序段格式中,N表示 ____、G表示____、M表示______、F表示______、S表示 ____。

一般在计算机中，一个汉字用______个字节表示。

（填空题）电子邮件地址的一般格式为：用户标识@_______表示。