问题
判断题
采输气设备在停工后或投运前，用惰性气体对系统进行吹扫或置换，以防止事故发生。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
采输气设备在停工后或投运前，用惰性气体对系统进行吹扫或置换，以防止事故发生。
参考答案：对
| 请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。 | |
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| 1. Don't talk loudly, my father with my uncle __ _____ about something. 2. The food ____ ____better than it looked. 3. I hope I ____ ____ a singer when I grow up. 4. Our school year usually ____ ____ at the end of June. 5. Jack____ ___ often nervous before the class in the past. |