【单选题】Faraday gave ________ most of his money to the poor. When he grew old, he did not have enough money left to live on.
【简答题】倾注平皿时,平板计数琼脂应冷却至____°C±____°C
【判断题】引入负反馈后,放大电路的上限频率降低,下限频率提高,因而通频带变住窄。
【单选题】He likes reading very much.Most of his money on books.
【单选题】关于颞下颌关节内强直的病因下列哪点是错误的()
【单选题】He left most of his money to his sons; his daughter only received a ______ share of his wealth.
【单选题】放大电路引入负反馈以后的通频带与无负反馈相比,倍数为