【单选题】用 50ml 滴定管进行滴定分析时,下列数据记录正确的是
【简答题】已知空气流经某空气过滤器的初含尘浓度为1.2mg/m 3 ,出口空气含尘浓度为0.2mg/m 3 ,求它的计重效率和穿透率。
【判断题】“Above the sea level” means altitude. ( )
【单选题】法律上的平等观念最为核心的内容是( )。
【简答题】某校科技活动小组用镁粉、盐酸、醋酸及设计的右图装置(夹持固定装置已略去),对两种酸分别与镁反应的速率以及是否存在电离平衡进行探究. (1)组装完成后,某同学发现该装置在设计上存在明显缺陷:根本无法完成实验,甚至存在危险,其缺陷在于______,其改进方法是______. (2)改进装置后,检查一侧装置的气密性的方法是______. (3)欲配制100mL实验所需浓度的盐酸,除50mL量筒、烧杯、酸...
【单选题】The “repeatable” level of CMM (Level 2 ) means that:
A.
both management and engineering processes are codified and followed
B.
metrics are used to control the process
C.
continuous process improvement is in place
【简答题】The (1) program means a program written in a high-level language. It is generally translated to an (2) program, which is in aform directly understandably by the computer. The translation is usually do...
【单选题】法律上的平等观念最为核心的内容是( )。
【简答题】指出下列句中加点词的活用情况并解释。 5. 王无罪岁() ___罪_________________________________