Thursday, September 22, 2022
问题:气相色谱分析仪中,热导池检测器属于()型检测器,氢火焰离子检测器属于()型检测器。...
Friday, September 16, 2022
问题:电力用油中,酸性成分的来源是什么?反映油中酸性特质含量的指标有哪些?...
Thursday, September 22, 2022
问题:强碱性阴树脂氧化变质后,表现出来的是()和()逐渐减少,且后者速度大于前者。...
Thursday, September 22, 2022
问题:在用标准称为5.0mL的移液管取溶液时正确的排液方法是()。...
Monday, September 19, 2022
问题:已知一条蒸汽管道的长是30米,工作时温度升高400℃,求这条蒸汽管道膨胀伸长量是多少?如果两端固定,中间安装一个"冂"形...
Saturday, September 17, 2022
问题:根据热力过程中熵的变化可以说明该过程是()还是()。...
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:起重三角架在使用时,每根支点与地面的夹角不小于()...
Thursday, September 22, 2022
Friday, September 16, 2022
Sunday, September 18, 2022
Thursday, September 15, 2022
Thursday, September 22, 2022
问题:汽包内的旋风分离器和百叶都是汽水分离装置,其中旋风分离器是()次分离元件,百叶窗是()次分离元件。...
Thursday, September 22, 2022
Friday, September 16, 2022
Sunday, September 18, 2022
Thursday, September 22, 2022
问题:在进行汽轮机油液相锈蚀试验时,规定的水浴恒温温度是()。C。...
Tuesday, September 20, 2022
Thursday, September 22, 2022
问题:单选题氧气瓶应放在安全可靠、气温适应的地方,不可()A 倒置B 平放C 斜置...
Sunday, February 18, 2024