Tuesday, September 20, 2022
判断玻璃仪器是否洗净的标准,是观察器壁上( )。A.附着的水是否聚成水滴B.附着的水是否形成均匀的 ...
Monday, May 2, 2022
Sunday, May 1, 2022
Tuesday, September 20, 2022
Tuesday, September 20, 2022
Tuesday, September 20, 2022
Saturday, April 30, 2022
Saturday, April 30, 2022
在负压操作系统同样条件下,进入少量空气更易发生爆炸危险的是盛放爆炸极限()的物料。 ...
Sunday, May 1, 2022
进入设备(塔、罐等)内部检修作业,应具各哪些条件,需办理哪些手续? ...
Tuesday, September 20, 2022
Tuesday, September 20, 2022
去现场确认硫化氢或者可燃气体报警时,需要带检测仪,同时双人去现场。() ...
Sunday, May 1, 2022
Tuesday, September 20, 2022
Thursday, April 28, 2022
Tuesday, September 20, 2022
Wednesday, September 21, 2022
Sunday, May 1, 2022
污水处理厂的处理效率,二级处理活性污泥法BOD5去除率为()。A.70%~90%B.65%~95%C.70%一95%D.60 ...
Sunday, May 1, 2022
Wednesday, September 21, 2022
在开车节能上:要避免冷车启动,避免突然变速,选择合适挡位避免低档跑高速,定期更换( ),高速莫开窗 ...
Monday, May 2, 2022