【简答题】带头结点的双循环链表L中只有一个元素结点的条件是:__________。【合肥工业大学1999三、3 2000三、2(2分)】
【判断题】由于共集电极放大电路交流从发射极输出,所以又称其为射极输出器。
【单选题】Trees of this kind are so __________ that they can been seen everywhere.
【判断题】三极管共集电极接法,简称为共集放大电路又称为射极输出器。
【单选题】Trees of this kind are so ______ that they can be seen everywhere.
【单选题】This kind of animal is able to protect itself from danger in many years. ________, the colouring of its hide makes it almost invisible when it is feeding in the shadow of trees.