下列对队列的叙述正确的是【】。A．队列属于非线性表. B_爱下问搜题

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问题单项选择题

下列对队列的叙述正确的是【】。

A．队列属于非线性表.

B．队列按"先进后出"原则组织数据

C．队列在队尾删除数据

D．队列按"先进先出"原则组织数据

答案

参考答案：D

解析：队列是一种操作受限的线性表。它只允许在线性表的一端进行插入操作,另一端进行删除操作。其中,允许插入的一端称为队尾(rear),允许删除的一端称为队首(front)。队列具有先进先出的特点,它是按"先进先出"的原则组织数据的,故本题答案为D)。

完形填空

In the first week after arriving in the new city for further study, I fell and broke my leg. I was really   36  by the kindness of my new roommate. “We are family now,” she said when she   37  me lying in my room with a swollen(浮肿的) 38 , unable to move. She took me to the nearest 39 by taxi to get my leg examined. The driver was so   40  that we arrived there very quickly. After that, my   41  didn’t stop helping me though I told her I could do things on my own.
So many blessings(幸事) I had never   42  came to me when I was alone and helpless. Bus drivers picked me up 43  anywhere they saw me. Many people   44  the door for me. Such things were small but   45  for a person on walking sticks.
  46 people’s kindness, I did whatever I could to make people   47  . I made many jokes about my two   48 and the bad fall. And I tried not to   49  even a single time about what had happened. I also tried to be kind to   50  students who were injured. I took time to   51  with a girl in a wheelchair who always ate lunch alone.
I soon realized that pain can be   52  by mental (精神上的) power. I could see that   53  I was using physical sticks, there were hundreds of mental sticks I could depend on. I also saw that sometimes   54  situations could be good. Einstein once said, “You can live your life seeing nothing as a miracle( 奇迹 )   55  seeing everything as a miracle.”

B．In place of

D．In return for

单项选择题

计轴技术是以（）为核心，辅以外部设备，利用统计车辆轴数来检测相应轨道区段占用或空闲状态的技术。

A.轴承

B.手机

C.GPS

D.计算机