问题
问答题 简答题
如何识别夹板卡损波假信号？
答案
参考答案：
70°探头距夹板头80-90mm左右时，产生报警，荧光屏一、二次波交替处显示回波，波幅稳定。通过目视或移动探头横向位位置进行判定。
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如何识别夹板卡损波假信号？
参考答案：
70°探头距夹板头80-90mm左右时，产生报警，荧光屏一、二次波交替处显示回波，波幅稳定。通过目视或移动探头横向位位置进行判定。
| 从方框内选出合适的单词并用其正确形式填空 | |
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| 1. Taking a taxi is than taking a bus. 2. Football is the sport in the world. 3. Please walk , or we'II be late for the meeting. 4. Sixty minutes is one 5. I'm going to wait for you at the bus . 6. It will you an hour to do the work. 7. There are lots of on the ship. They are leaving for the USA. 8. The from my home to the station is two kilometres. |