问题
填空题
涂油机维护标准是喷嘴清扫频度1次/年，电极清扫频度（）。
答案
参考答案：1次/月
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涂油机维护标准是喷嘴清扫频度1次/年，电极清扫频度（）。
参考答案：1次/月
| 从下列方框中选适当句子并改为定语从句填空，注意其形式变化。 | |
2. Rose likes the dress ___. 3. The museum ___ was shut when we got there. 4. What's the name of the film ___? 5. Do you know some of the people ___ couldn't come? 6. The car ___ broke down after a few miles. 7. Have you finished the work ___? 8. We stayed at a hotel ___. |