A typical photovoltaic cell consists of semiconductor material (usually iron oxide) having a PN junction.
举一反三
- After the formation of the pn junction, there is a built-in voltage across the junction.
- After the formation of the pn junction, there is a built-in voltage across the junction. A: 正确 B: 错误
- _________ is a typical substructure. It consists of column, iron plate, steel beams and concrete pad.( ) A: Pile B: Aerodynamic resistance C: Spread Footing D: Narrowed foundation
- The White Cliffs of Dover are composed mainly of: A: Calcium Carbonate B: Silicon Dioxide C: Mangan Oxide D: Iron Oxide
- Civilization______ having a constructive attitude. A: consists of B: consists on C: consists about D: consists in