问题
名词解释
波节
答案
参考答案：
驻波中某种声场特性的幅值为最大的点、线、面。
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波节
参考答案：
驻波中某种声场特性的幅值为最大的点、线、面。
| 用方框内所给的词填空。 | |
2. Please give the boy's to our teacher. 3. Ben is a student. 4. My father's parents are my and . 5. He had an accident; ,he wasn't badly hurt. 6.At the end of this term we're going to have exams. 7.The Picture 1 is bad. The Picture 2 is worse. The Picture 3 is the of the three. 8.A young Chinese woman is talking with her teacher. |