【简答题】半导体中中存在两种载流子:____和____。纯净的半导体称为____,它的导电能力很差。掺有少量其他元素的半导体称为杂质半导体。杂质半导体分为两种:N型半导体--多数载流子是____;P型半导体--多数载流子是____。当把P型半导体和N型半导体结合在一起时,在两者的交界处形成一个____结,这是制造半导体器件的基础。
【简答题】纯净的半导体称为____,它的导电能力很____。在纯净的半导体中掺入少量的____价元素,可形成P型半导体,又称____型半导体,其中多数载流子为____,少数载流子为____。 2、在本征半导体中掺入____价元素,可形成N型半导体,其中多数载流子为____,少数载流子为____,它的导电能力比本征半导体____。
【单选题】-- I'm sorry to have shouted at you. I didn't mean to be so rude.--You were very angry. Anyway, ______.
【单选题】A supermarket places its store brand of blackberry jam priced at $5 per jar in the fruit preserves aisle, alongside the jam jars of a better known brand—whose products are priced at $8 apiece. Store m...
B.
product bundle pricing
C.
captive product pricing
【单选题】タベはとしても疲れていた。____風呂に入ってからずく寝た。
【单选题】I'm sorry to trouble you. ---( )
【单选题】I'm sorry to you so much trouble. I hope you can forgive me and have a good rest now.
【简答题】纯净的具有晶体结构的半导体称为 ,常用半导体材料有 和 ,它们都是4价元素,原子外层有 个价电子,且在相邻原子之间形成稳定的 结构,因此载流子浓度很低,所以导电能力 。
【简答题】补全对话。 Mum: Where 1. you 2. yesterday, Jim? Jim: I 3. to the store in the morning. I 4. a pair of shoes and a T-shirt. In the afternoon, I 5. to the gym and 6. ping-pong with Jenny. I 7. Jenny to hit t...
【单选题】-I'm sorry to have shouted at you. I didn't mean to be so rude to you. -You were very angry. Anyway, ____.