如图所示是某同学设计的用高锰酸钾加热制取氧气的实验装置图,按照要求填写下列空白: (1)指出图中仪器的名称(至少写出4种仪器,顺序不作要求): ① ,② , ③ ,④ 。 (2)找出该装置的主要错误(只找出三处): ① ; ② ; ③ 。 (3)写出试管中的发生反应的文字表达式: 。 (4)当导管口 产生时,不宜收集;当气泡 时,则可以收集开始收集氧气;氧气收集满的标志是 ,这是在水中用玻璃片盖住 ,移出水面,再正 放在桌面上。
【简答题】● Embedded system is (66) special computer system which is scalable on both software and (67). It can satisfy the strict requirement of functionality, (68) , cost, volume, and power consumption of the...
【单选题】Embedded system is(66)special computer system which is scalable on both software and(67). It can satisfy the strict requirement of functionality,(68), cost, volume, and power consumption of the partic...