问题
单项选择题
微机保护系统提高可靠性抗干扰最主要的措施是（）。
A、远离干扰源
B、切断干扰的耦合途径
C、降低作为干扰接收电路的微机保护装置本身对干扰的灵敏度
D、采取有效的软、硬件措施抑制窜入干扰
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
微机保护系统提高可靠性抗干扰最主要的措施是（）。
A、远离干扰源
B、切断干扰的耦合途径
C、降低作为干扰接收电路的微机保护装置本身对干扰的灵敏度
D、采取有效的软、硬件措施抑制窜入干扰
参考答案：B
| Read and choose. 阅读短文,选择正确的答案。 |
| Yesterday I walked to the park and played with my sister Jing. We saw many people playing happily. Some were talking, some were walking, some were flying kites. And some were laughing loudly. Jing and I were flying a kite. It was high in the sky. We had a good time. We also helped a little girl. She cried because she fell and hurt her knee. |
| 1. Yesterday we went to the . |
[ ] |
| A. zoo B. park C. restaurant |
| 2. Jing is my . |
[ ] |
| A. friend B. sister C. classmates |
| 3. Jing and I were in the park. |
[ ] |
| A. talking B. flying a kite C. playing |
| 4. They helped . |
[ ] |
| A. a little girl B. a boy C. a baby |
| 5. They to the park. |
[ ] |
| A. run B. walked C. ride |