问题
判断题
OTDR测试曲线中,横坐标表示距离,纵坐标表示相应距离处延光纤前向传播的光功率。
答案
参考答案:错
OTDR测试曲线中,横坐标表示距离,纵坐标表示相应距离处延光纤前向传播的光功率。
参考答案:错
用方框里所给词的适当形式填空。 | |
in a factory. He makes 4 of machines. My mother is a teacher 5 English. I 6 in a secondary school. My father is forty. He works hard. My mother is very busy. After work, she 7 the cooking 8 home. I like 9 . Mother doesn't like it. But she 10 singing. She sings very well. What a happy life we are having! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. |