Thursday, September 22, 2022
Friday, September 16, 2022
问题:单选题对于油品来说,蒸馏过程中,随温度升高,烃类分子按沸点高低顺序逐渐蒸出,蒸馏到最后所能达到的最高汽相温度称为()。A 终馏点B 初馏点C 闪点D 中馏点...
Saturday, August 5, 2023
问题:单选题属于其它类型的水泵的是()A 气升泵B 螺杆泵C 凸轮泵D 轴流泵...
Sunday, December 10, 2023
问题:单选题在劳动过程中,工业毒物引起的中毒叫()。A 工伤B 职业中毒C 劳动伤害D 致敏性...
Sunday, June 25, 2023
问题:旋涡泵在叶轮直径和转速与离心泵相同时,旋涡泵扬程高。...
Thursday, September 15, 2022
问题:我国工业企业噪声卫生标准规定,工业企业的生产车间和作业场所等工作噪声标准为()分贝。...
Saturday, September 17, 2022
Sunday, September 18, 2022
问题:泵80IYⅡ-80与80IYⅡ-802相比,后者扬程高于前者。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Friday, September 16, 2022
问题:容积式水泵按泵体工作室容积改变分,有()、()两种。...
Friday, September 16, 2022
问题:单选题螺杆泵是一种()泵。A 离心B 齿轮C 柱塞D 容积...
Friday, April 7, 2023
Friday, September 23, 2022
Tuesday, September 20, 2022
问题:单选题齿轮泵内有(),所以存在串漏问题。A 闭死容积B 卸荷槽C 卸荷孔D 高、低压腔...
Friday, March 3, 2023
Thursday, September 22, 2022
Friday, September 23, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022