把下面句子变成变动语态。

1. We use the computer to search for information.

    The computer _____ _____ to search for information.

2. We used the computer for playing games.

    The computer _____ _____ for playing games.

3. Jackson designs this CD-ROM.

    This CD-ROM _____ _____ by Jackson.

4. We call it printer.

    It _____ _____ printer.

5. They learn English on the radio.

    English _____ _____ on the radio.

整定工作电流的过程实质上就是流过电桥的电流趋于计算值的过程。