Thursday, December 14, 2023
问题:下列物质中,不用于溶剂型漆的表面活性剂的是:()。A、环烷酸锌B、环烷酸铜C、蓖麻酸锌D、邻苯二甲酸二丁酯
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:工业管道接介质的温度分类,小于或等()时称为低温管道。
Saturday, September 10, 2022
Saturday, October 26, 2024
Tuesday, September 13, 2022
问题:分馏塔冲塔时,汽液相不再传质传热,造成塔内分馏效果严重变坏。
Saturday, September 10, 2022
Tuesday, September 13, 2022
Friday, November 11, 2022
Tuesday, September 5, 2023
问题:离心泵抽空将造成在叶轮的()靠近盖扳部位和叶片的入口附近出现“麻点”,或蜂窝状破坏,有时后盖板处也会有这种破坏现象,严重时,甚至会穿透前后盖扳。A、出口处B、表面上C、入口处D、无法确定
Saturday, September 10, 2022
Tuesday, September 13, 2022
问题:其他条件不变,加大常一线重沸温度,则()。A、常一干点降低B、常一干点升高C、常一初馏点降低D、常一初馏点升高
Monday, October 3, 2022
Monday, January 15, 2024
问题:流体稳定流动时有四种能量可能发生变化()、()、()以及()。
Saturday, November 5, 2022
Saturday, May 13, 2023
Saturday, September 10, 2022
Tuesday, September 13, 2022