问题
判断题
脉冲波超声检测仪可依据反射波的传播时间和幅度确定试件中的缺陷位置和大小。
答案
参考答案：对
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脉冲波超声检测仪可依据反射波的传播时间和幅度确定试件中的缺陷位置和大小。
参考答案：对
| 用方框内所给单词的适当形式填空。 | |
2. The man jumped down to safety ____. 3. Here is a photograph of our village. Our village is in a ____. 4. She ____ down to tie her shoe laces. 5. He said that he ____ English to maths. 6. They were ____ to face up to the difficulties. 7. After ____ he went abroad for further education. 8. The water is ____. Would you turn off the stove? 9. The river ____ into the sea. 10. Has he made the exam ____? |