Sometimes the EAC is not available, and no other software available.
Could I use the software that windows operating system contains to convert the .cda file form Audio CD to .wav file to my hard disk?
Is it possible?

This will allow you to read .cda files in any DirectShow application:
http://sourceforge.net/project/showfiles.p...ackage_id=84799
You could then use a variety of methods to create WAV files from CDA.
Why not just stick EAC on a floppy or USB keychain, though?

That means it will also needed additional software, right?

It seems that the windows operating system do not contain that function. We must use 3rd party software to convert .cda file to .wav file.

If you're using Win2000 or WinXP then you dont need any drivers for a USB keychain/pendrive. And you certainly don't need drivers for a floppy disk

.CDA are not really "files". They show up as files in Windows Explorer, but they're just an abstraction of audio data in an audio CD. So copying audio from CDs is not just a matter of copying files: you need a "ripping" soft to read the audio data and store it in a real file (WAV, MP3, etc). EAC is one example, CD Burner XP Pro is another, or CDEx, etc.

Then I have to use the additional software to conver .cda to .wav

Dose the Windows Media Player contains that function?

The point trying to be made is that .cda is not a "real" file type. It is just a windows shortcut to the data on the cd that is for all intents and purposes .wav.