阅读理解

    Mark Twain, the famous American writer and a great master of humor, liked to play jokes on others. But once a joke was played on him. One day Mark Twain was invited to give a talk in a small town. At lunch he met a young man, one of his friends.

    The young man said that he had an uncle with him. He told Mark Twain that his uncle never laughed or smiled, and that nobody and nothing was able to make his uncle smile or laugh.

    "You bring your uncle to my talk this evening," said Mark Twain. "I'm sure I can make him laugh."

    That evening the young man and his uncle sat in the front. Mark Twain began to speak. He told several funny stories and made everyone in the room laugh. But the man never even smiled. Mark Twain told more funny stories, but the old man still kept quiet. Mark Twain continued to tell his funny stories. Finally he stopped. He was tired and quite disappointed.

    Some days later, Mark Twain told another friend what had happened." Oh," said his friend, "I know that man. He's been deaf for years."

我当然反对改变这个体系。

I would certainly the system.

阅读下面这首元诗，完成下列小题。

苍洱临眺

李京

水绕青山山绕城，万家烟树一川明。

鸟从云母屏中过，鱼在鲛人镜里行。

翡翠罘崽笼海气，旃檀楼阁殷秋声。

虎头妙墨龙眠手，百帧生绡画不成。

（注释）李京，字号山，河间人。元大德五年至云南，曾任乌撒、乌蒙宣慰使。苍洱：大理苍山、洱海。云母屏：云母镶嵌的画屏。鲛人：鱼尾人身，美人鱼。罘崽：fú sī屏风。旃zhān檀：檀香木。虎头：晋代著名画家顾恺之，小名虎头。龙眠：宋代著名画家李公麟，号龙眠。生绡：素色丝织物，古人以之作画。

同温同压下，甲容器中HCl气体和乙容器中的NH₃气体所含的原子个数相等，则甲、乙两容器的体积之比为（   ）

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

    Chinese proverbs are rich and they are still widely used in Chinese people's daily life.  these proverbs there are often interesting stories. For example, the proverb, "plucking up a crop (help)it grow", is based on the following story.

    It is said that a short-tempered man in the Song Dynasty(960—1279)was very anxious to help his rice crop grow up (quick). He was thinking about it day and night. But the crop was growing much (slow) than he expected.

    One day, he came up with an idea  he would pluck up all of his crop a few inches. He did so the next day.

    He was very tired after (do) this for a whole day,  he felt very happy because the crop did "grow"(high).

    His son heard about this and went to see the crop. Unfortunately the leaves of the crop began to wither.

    This proverb is saying we have to let things go in their (nature) course. Being too anxious to help an event develop often (result)in the contrary to our intention.

直线 的倾斜角是.

用适当的连词填空每空一词。

Our teacher told us to ___________ the work ____________ we did just now.

he has failed many times, he never lost heart.

默写

若矩阵 是线性方程组 的系数矩阵，则（   ）

The doctors manage to keep the pain at a(n) (tolerate) level.

标准状况下将V L A气体（摩尔质量为M g·mol^-1）溶于0.1 L水中，所得溶液密度为ρ g·cm^-3 ， 则此溶液的物质的量浓度(mol·L^-1)为(   )

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。

宋代，人们对丰盛饮食的追求，不仅体现在鲜香诱人的味觉体验，①，尤为突出者即当时所谓的“看菜”。席面摆设“看菜”本源于一种古老的礼仪，所设食物皆可食用。但后人曲解古礼本意，②，无疑是对食物的极大浪费。此外，宋人饮食过于求精求新，热衷对食物进行装饰、雕刻等加工，对食材精雕细刻、制作奇巧造型，夺人耳目之余，③。

请对下面这段新闻报道的文字进行压缩，要求保留关键信息，句子简洁流畅，不超过80个字。

2020年11月24日4时30分，中国在海南文昌航天发射场，用长征五号遥五运载火箭成功发射探月工程嫦娥五号探测器，顺利将探测器送入预定轨道。嫦娥五号将突破一系列关键技术，并携带月球岩石样本回到地球，预计任务飞行时间在13天左右。通过实施嫦娥五号无人月球采样返回任务，中国在月球科学研究方面将更进一步，开展着陆点区域形貌探测和地质背景勘察，获取与返回样品相关的现场分析数据，建立现场探测数据与实验室分析数据之间的联系；对月球样品进行实验室研究，分析着陆点月表物质的结构、成分、物理特性，深化月球成因和演化历史的研究。

设 为阿伏加德罗常数的值，下列叙述正确的是(    )

用在矩阵行列式中所学的知识和方法，解方程组： ．

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（＼）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分。
    My high school life has made me learn many things. Between them teamwork is the most significantly for me. In fact, I didn't realize its importance after I was elected monitor. In the begin, I did almost all the duties myself, however, others students cared little about class activities. Therefore, I worn out and depressed. Then I turned to my head teacher but he advised me to cooperate with others. Gradually, I realized the strengths of my classmates and managed to have everyone to play a part in class. It is working in teams instead of on my own which has freed me of trouble and make my work more efficient.

已知矩阵A= ． 若矩阵A属于特征值6的一个特征向量为a₁= ， 属于特征值1的一个特征向量为a₂= ， 矩阵A= ．

设a＞0，a≠1，行列式D=中第3行第2列的代数余子式记作y，函数y=f（x）的反函数图象经过点（2，1），则a= ．