【单选题】It was warmer now, and the snow was beginning to ( )
【简答题】(3)在有n个元素的栈中,进栈操作的时间复杂度为 。
【单选题】The snow was now two feet deep, making it difficult, if not impossible, _______ the car out.
【简答题】在有n个元素的栈中,进栈操作的时间复杂度为。
【单选题】It is now. Please take an umbrella. [ ]
【单选题】The country, __with cherry tree flowers, looks as though it is now under a blanket of pink snow.
【简答题】It _____ (snow) now.
【判断题】在有n个元素的栈中,进栈操作的时间复杂度为O(n)。
【简答题】It _______(snow) heavily just now and the ground is still covered with white snow.