问题 单项选择题

栈和队列的共同点是( )。

A.都是先进先出

B.都是先进后出

C.只允许在端点处插入和删除元素

D.没有共同特点

答案

参考答案:C

解析: 栈和队列都是操作受限制的线性表,只允许在端点插入和删除。不同点是:栈只允许在襄的一端进行插入和删除操作,而队列允许在表的一端进行插入操作,而在另一端进行删除操作。

写作题

同学们,恩阳区即将建立恩阳高级中学新校区。让我们也行动起来吧!为了让学校变得更加美好,为家乡建设添砖加瓦,请同学们为校园建设积极建言献策。假如你是恩阳中学初三年级学生李华,请你写一份建议书。 (以上内容无需表述)

内容要点:1、校园环境(如:植树、种花、运动场、图书馆……)

2、特色课程(如:舞蹈、音乐……)

注   意:1、文中不得出现真实姓名和学校名称;80词左右。文章开头、结尾已经给出,不计入总词数。

2、要点齐全,语言通顺,意思连贯,书写规范,可以适当发挥。

3、提示词:hope; organize; playing fields(运动场)

Dear Headmaster,

I am very glad to write to you. These days we are talking about how to make our school more beautiful. Here are some of my suggestions.                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                              

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                                                                             

                                  

Thanks for your reading!

Yours sincerely,

Li Hua

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