问题
判断题
氟利昂系统充氮压力检查后，为防止设备和管路中存在单向漏气的缺陷，还需经过真空试验，确保系统密封的可靠性。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
氟利昂系统充氮压力检查后，为防止设备和管路中存在单向漏气的缺陷，还需经过真空试验，确保系统密封的可靠性。
参考答案：对
| 用方框中所给词的适当形式填空。 | |
2. Thanks for_________me to your birthday party. 3. Could you_________us your family photos? 4. The radio says it will stop_________. 5. On weekends she always_________her brother. 6. Can you come over to_________our science report? 7. He is very funny. He always makes his classmates_________． 8. Last Saturday my best friend_________me with my math. 9. He doesn't like talking or laughing. He's_________and quiet. 10. Mr. Green won't go to the concert_________he is'really busy. |