题海网，海量题库；找题库、找试卷、找答案就上题海网。

我国少数民族最多的省区是（    ）

Please give ____ a cup of tea .

设N_A是阿伏加德罗常数的数值。下列两种说法均错误的是（    ）

如图所示的数阵，第n行最右边的数是．

如图为一简单组合体，其底面ABCD为正方形，PD⊥平面ABCD，EC∥PD，且PD=AD=2EC=2．

（1）请画出该几何体的三视图；

（2）求四棱锥B﹣CEPD的体积．

口算下面各题．

3＋7＝	10－1＝	4＋5＝
2＋2＝	8－3＝

地球上的水存在的状态有（    ）

在一个国家或地区的人口中，男女比例大致是1：1；而在一个多女子家庭中，男女比例不是1：1的情形也很多。请你运用本节所学的知识，对此作出合理的解释。

读图文材料，完成下列各题。

材料一个区域的自然地理要素主要由位置、地形、气候、水文等组成，各自然地理要素之间相互联系、相互影响，同时各自然地理要素又影响该区域人口、城市的分布等。下图为亚洲轮廓简图及气候类型分布图

 He ____ a small room. ____ a table in the room. 

      Once upon a time there lived a woman who had a bad temper(脾气). She 1 at everyone around her. For most of her life she believed the anger inside her was  2  else's fault(过错).
     She went to see a wise monk(高僧) to ask for  3  . The monk told her to take a large pot（罐子) from his kitchen, fill it with  4 , and stand outside on the sidewalk in front of his house. “It's hot outside,” the monk said to her “When a person 5 , you must give him or her a glass of water. Do this until there is no6  left inside you.”  7  she stood outside with a water pot and served water to walkers every day for the next several weeks.
     Every morning she asked   8  if there was any anger inside her. And every morning the answer was, “yes.” So she continued 9 water. Until one afternoon when a man walked up, took the water pot out of her hand and drank the water up, and then  10 it onto the ground as he went on his way.
     The woman was very  11 . Unable to control herself, she  12  the pot and threw it at the rude man. The pot broke into pieces over the back of his head and he fell to the ground, bleeding.
     As the woman calmed down, she realized the mistake of what she had made and began to cry. She called 911 and  13  what had happened. A moment later an ambulance(救护车) and two police cars arrived and took the man away. Then one of the police officers walked over to the woman, who was  14crying, and said, “ The city owes(欠) you a big ‘thank you.’ That man has been  15 our wanted list for over a year now. He is an important suspect in many murder cases and robberies.”

如图，将半径为4cm的圆折叠后，圆弧恰好经过圆心，则折痕的长为（   ）

根据如图所示的已知角的度数，求出其中∠α的度数为．

小华和小组成员想在暑假合作开发一款图书管理系统，主要工作有：①与图书管理员讨论分析系统需要实现的功能 ②规划并绘制系统功能结构图 ③进行开发实践④选择合适的开发工具和平台 ⑤选择B/S的体系结构。正确的开发顺序是（        ）。

综合性学习活动。

    人与自然是生命共同体，人类必须尊重自然、顺应自然、保护自然。但随着人口的增多，人类动的日趋频繁，空气污染、土壤沙化、水土流失、温室效应等都在加剧。为此我们应当树立和践行绿水青山就是金山银山的理念，倡导简约适度、绿色低碳的生活方式。2021年6月5日是第五十个世界环境日，学校围绕“低碳减排．绿色生活”，开展了一系列活动，请你参加以下活动。

①作为班长，你向同学们提出哪些建议，以实现“低碳减排．绿色生活”？

②[公益宣传]朱丽华同学想为今年的世界环境日拟写一条宣传标语，请你相帮他。要求：呈对偶句式，对仗工整。

③[口语交际]学校团委委托刘选同学电话邀请市环保局王科长，于6月5日下午3：00在八(1)班教室参加主题班会，并请他在主题班会上介绍我市的环境状况。请你以刘选的口吻设计一段电话邀请词。

把下列国家与主要的物产用直线连接起来

泰国                 最大橡胶生产国

马来西亚             世界最大的椰子生产国

印度尼西亚           世界最大的油棕生产国

菲律宾               重要的稻米生产国

缅甸                 世界最大蕉麻生产国

阅读理解

Dear Jenny,

    How are you? I am visiting my cousin Howard in Australia. It is hot in Hong Kong but it is cold in Australia in June. When it is summer in Hong Kong, it is winter in Australia. It is snowing heavily now. I like snow a lot and it is a white world outside. I want to play with my cousin in the snow this afternoon. We can make a snowman. I think it is very interesting!

    I like my cousin's house. It is big and there is a beautiful garden (花园). We can play ball games in the evening. My cousin's neighbors are friendly but they cannot speak Chinese. I talk with them in English.

    See you next month.

X，Y和Z是第三周期的三种元素．已知：X的单质与水在常温条件下就能剧烈反应，Y的最高价氧化物对应的水化物是一种酸性最强的酸；Z 能形成氯化物 ZCl₅ ． 上述三种元素原子的半径由大到小的顺序是（   ）

商场在元旦期间开展促销活动，乐乐的妈妈在活动期间买了一件2100元的大衣，她应该得到多少元的购物券？

大气是地球长期演化的结果，也是地球上存在高级智慧生命的重要原因。据此回答下列小题。