户内燃气管道损坏,导致燃气泄漏。户内燃气管道损坏的主要原因有哪些?...
Thursday, September 22, 2022
Thursday, September 22, 2022
单选题回填淘槽的方法有()两种方法。A 人工、机械B 人工、夯实C 夯实、机械...
Thursday, February 1, 2024
Saturday, September 17, 2022
多选题用户家液化气泄漏,抢修人员上门时,下面哪些做法是错的()A进门前敲门B进门前按门铃C去之前打电话预约D打开抽油烟机E开窗通风...
Tuesday, July 11, 2023
判断题冬季风力达到8级以上时严禁使用燃气热水器,不得连续使用2小时以上()A 对B 错...
Tuesday, July 11, 2023
Sunday, March 12, 2023
Friday, January 26, 2024
单选题A型分子筛的寿命有()A 一般为1—2年B 一般为3—4年C 一般为2—3年D 一般为4—5年...
Sunday, June 4, 2023
Saturday, November 18, 2023
Thursday, September 22, 2022
Saturday, September 17, 2022
Thursday, September 22, 2022
多选题钢管除锈方法有()A人工除锈B机械除锈C电化学除锈D化学除锈E高温除锈...
Sunday, June 4, 2023
Sunday, June 4, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
Friday, September 16, 2022
Saturday, September 17, 2022
Wednesday, September 14, 2022