单词拼写

1. There still _______(存在)a rare animal on that lonely island.

2. I did hear that the Bank of England had _______(发行) two notes in this amount.

3. It is _________ (明显)that a healthy diet does us a lot of good.

4. The photo often _________(想起)me of the days I spent in the small village.

5. You'd better __________ (道歉)to your mother for your rudeness.

6.The prison camp was ______(环绕)by high walls and barbed wire,so it's quite difficult for the prisoners to escape.

7.The job of being a nurse needs much love and _________(耐心).

8.According to the ______ (理论)of Relativity(相对论), nothing can travel faster than light.

9. Julie's best friend encouraged her to eat a ________(平衡) diet to keep fit.

10. Festivals such as Obon and Halloween are held in _________(纪念)of the dead..

直流稳压电源中滤波电路应选用（）。

A.高通滤波电路

B.低通滤波电路

C.带通滤波电路

D.带阻滤波电路