【单选题】镍镉蓄电池的正极材料为氢氧化亚镍和石墨粉的混合物,负极材料为( )。
【单选题】下列有关化学电源电极的叙述不正确的是( )
【简答题】镍镉蓄电池的正极材料为( )和 ( ) 的混合物。
【简答题】镍镉蓄电池的正极材料、负极材料和电解液分别为:
【单选题】Is point K in line AB?
【单选题】What is the main point of Part K?
A.
It is a must to dress nicely for an interview.
B.
How we behave affects our interview results.
C.
No matter how well you are prepared for an interview, it is still very common that you do not get the position.
D.
First impression plays an important role in interviews.
【判断题】锂电池成本高:主要是正极材料LiCoO2的价格高,但按单位能量(W•h)的价格来计算,已经低于镍氢电池,与镍-镉电池持平,但高于铅酸蓄电池。