通常对干扰源设备加装滤波器的主要目的是为了减小干扰源的（）干扰。

A、邻道干扰

B、杂散干扰

C、交调干扰

D、阻塞干扰

按照要求完成下列各题

1. What other things did he say?(改为同义句)

    ________ ________ did he say?

2. Why don't you go to the Great Wall?(改为同义句)

    ________ ________ go to the Great Wall?

3. She doesn't know where she should go.(改为简单句)

    She doesn't know ________ ________ ________.

4. My vacation is very exciting.(对画线部分提问)

    ________ was ________ vacation?

5. To take medicine on time is necessary.(改为同义句)

    ________ ________ ________ take medicine on time.