已知A是的一个内角，若 ， 则是(   )

下列互为同位素的是（   ）

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。

    A young man, while traveling through a desert, came across a spring of clear water. The water  (be) sweet. He filled his leather container so that he could bring some back to an elder  had been his teacher. After a four-day journey, the young man (present) the water to the old man. His teacher took a deep drink, smiled (warm), and thanked his student very much for the sweet water. The young man (go) home with a happy heart.  

    After the student left, the teacher let student taste the water. He spit it out, (say)it was awful. Apparently, it was no longer fresh because of the old leather container. He asked his teacher, "Sir, the water was awful. Why did you pretend to like?" The teacher replied, "You tasted the water. I tasted the gift. The water was simply the container for an act of kindness and love. Nothing could be(sweet). "We understand this lesson best when we receive (gift) of love from children. Whether it is a cheap pipe or a diamond necklace, the proper response is appreciation. We love the idea within the gift rather than the thing.

语法填空

    Facebook CEO Zuckerberg just had a baby girl named Max, and to honor the occasion, he's giving away the majority of his wealth. In the letter   (write) by Zuckerberg and his wife, Priscilla Chan, to     (they) new baby girl, he announced the birth of his first child and the     (create) of the Chan Zuckerberg Fund,      will focus on curing disease, connecting people and     (build) strong communities.  

    "For your generation to live in      better world, there is so much more our generation can do, "Zuckerberg wrote." Today your mother and I are committed to spending our lives doing our small part to help solve these challenges. "The couple     (donate) nearly all of their Facebook stock to the cause." We will give 99% of our Facebook shares—currently about 45 billion—to advance this      (value) mission, "he wrote." We know this is a small contribution compared      all the resources and talents already working on these issues. But we want to do    we can, working along with many others."

按要求作答。150字左右。

步入高中，很多同学感觉记叙文不好写了，也写不好了，很是苦恼。老师们把大家记叙文写作的主要问题归纳为：

①主题肤浅，没有见地；

②思路固定，缺乏设计；

③素材陈旧，缺少新意；

④堆砌辞藻，华而不实。

任务① 请结合自己记叙文写作的实践，选择其中一个问题，谈谈你对这个问题形成原因的思考。要求：观点明确，自圆其说，条理清晰。

阅读下面的文言文，完成下面小题。

三年正月，高祖率甲士三万人、强弩五千张、舟舰二千乘，发自豫章。二月，次桑落洲，遣中记室参军江元礼以事表江陵，承制加高祖鼓吹一部。是时僧辩已发湓城，会高祖于白茅湾，乃登岸结坛，刑牲盟约。进军次芜湖，侯景城主张黑弃城走。

三月，高祖与诸军进克姑孰，仍次蔡洲。侯景登石头城观望形势，意甚不悦，谓左右曰：“此军上有紫气，不易可当。”乃以木笼贮石沈塞淮口，缘淮作城，自石头迄青溪十余里中，楼雉相接。诸将未有所决，僧辩遣杜期问计于高祖，高祖曰：“前柳仲礼数十万兵隔水而坐韦粲之在青溪竟不渡岸贼乃登高望之表里俱尽肆其凶虐覆我王师。今围石头，须渡北岸。诸将若不能当锋，请先往立栅。”

高祖即于石头城西横陇筑栅，众军次连八城，直出东北。贼恐西州路断，亦于东北果林作五城以遏大路。景率众万余人、铁骑八百余匹，结阵而进。高祖曰：“军志有之，善用兵者，如常山之蛇，首尾相应。今我师既众，贼徒甚寡，应分贼兵势，以弱制强，何故聚其锋锐，令必死于我？”乃命诸将分处置兵。

贼直冲王僧志，僧志小缩，高祖遣徐度领弩手二千横截其后，贼乃却。高祖与王琳、杜龛等以铁骑悉力乘之，贼退据其栅。景仪同卢辉略开石头北门来降。

荡主戴冕、曹宣等攻拔果林一城，众军又克其四城。贼复还，殊死战，又尽夺所得城栅。高祖大怒，亲率攻之，士卒腾栅而入，贼复散走。景与百余骑弃槊执刀，左右冲阵，阵不动，景众大溃，逐北至西明门。景至阙下 ， 不敢入台，遣腹心取其二子而遁。

高祖率众出广陵应接，会景将郭元建奔齐，高祖纳其部曲三千人而还。僧辩启高祖镇京口。

（节选自《陈书·本纪第一·高祖上》）

下列互为同位素的是

完形填空
阅读下面短文，从各题A、B、C、D四个选项中，选出可以填入空白处的最佳答案。
    “How does the yard look?” My father asked, with his eyes shining. I could tell he was eagerly waiting for my 1. “Wonderful!” I replied after I gave it a thorough 2 . Then I recited all the changes I had 3 in his yard and he smiled contently.
    When I was young, my mother 4 in a car accident, leaving my father alone to 5 their three young daughters. At the beginning, life was not always6and my younger sisters usually complained. However, Dad always 7 us to believe that life was good. Meanwhile, he tried his best to 8that belief.
    In 1972, my dad developed a piece of waste land that had been9 on Okaloosa Island. Every year at the first sign of 10 , he would begin spending countless hours working there to make it be bursting with colors. Through his continuous hard work, the land 11turned into a beautiful garden with different types of flowers and other unique plants. While our friends were enjoying their vacation through traveling to different places, we were 12 working with my dad in his yard, watering the flowers, weeding or cutting off the branches. Sometimes, our friends were envious of our working vacation, and we would 13 them. Dad made his yard very 14 so that it became our vacation paradise during our childhood.
    For so many years, when we were 15 , we liked to visit Dad's yard, because it could 16us of Dad's belief. It was Dad and his yard that gave us 17 that enabled us to survive and 18 major challenges in life. One day, it shocked us that Dad said he would not 19 the yard. Then he explained, “Twenty years ago I decided to start my work in that yard to tell you life is good. Now my work is done.” We were sitting in 20, recalling what we had experienced. Life was good. Dad was right.

在新研制的超导材料中，铊(Tl)是其主要组成元素之一，自然界中存在的稳定铊原子有 和 两种。下列说法正确的是（   ）

某校课外活动小组为测定已部分脱水的生石膏的组成(xCaSO₄·yH₂O),做如下实验：将固体加热，测量剩余固体的质量随时间的变化关系，如图所示。

The popular star stood there,_______by many students.

Studies have long shown that our heart rates and anxiety levels rise and fall ______ on the speeds of the music we hear.

补写出下列句子中的空缺部分。

He admitted that when ______ comes to repairing a computer, he had little knowledge of it.

I'm afraid I d with you on the matter.

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35个字。

随着四川新建的448个精准扶贫自动气象站观测数据全部成功上传，我国地面观测站网建设取得历史性进步，全国1185个贫困乡镇自动气象站如期建成，实现全覆盖。这彻底解决了全国贫困地区自动气象站少、气象观测资料空白区多、气象灾害监测能力弱的长期难题，为筑牢气象防灾减灾第一道防线和保障生命安全、生产发展、生活富裕、生态良好等提供了坚实支撑。贫困地区自然条件差，灾害频发，补齐防灾减灾短板是脱贫攻坚决战决胜的重要举措之一。

标准状况下，往100mL 0.1mol/L的FeBr₂溶液中通入一定体积的Cl₂ ， 充分反应后，溶液中有50%的Br^﹣被氧化．则通入的氯气的体积是（   ）

阅读理解

    Two students started quarreling at school. One student shouted dirty words at the other, and a fight began. What can be done to stop fights like this at school? In some schools, the disputants sit down with peer mediators(同龄调解者). Peer mediators are students with special training in this kind of problems.

    Peer mediators help the disputants to talk in a friendly way. Here are some of the ways they use:

1) Put what you think clearly but don't say anything to hurt the other. Begin with “I feel…” instead of “You always…”

2) Listen carefully to what the other person is saying. Don't stop the other person's words.

3) Keep looking at the other person's eyes when he or she talks.

4) Try to see the other person's side of the problem.

5) Never put anyone down. Saying things like “You are foolish” makes the talk difficult. 6) Try to find a result that makes both people happy.

    Peer mediators never decide the result or the winner. They don't decide who is right and who is wrong. Instead, they help the two students to find their own “win-win” result.

— Why not meet Diana today?

— I am sorry to tell you that she has been ________ from our company.

阅读下面的文言文，完成下面小题。

屈原者，名平，楚之同姓也。为楚怀王左徒。博闻强志，明于治乱，娴于辞令。入则与王图议国事，以出号令；出则接遇宾客，应对诸侯。王甚任之。

上官大夫与之同列，争宠而心害其能。怀王使屈原造为宪令，屈平属草稿未定。上官大夫见而欲夺之，屈平不与，因谗之曰：“王使屈平为令，众莫不知，每一令出，平伐其功，以为‘非我莫能为’也。”王怒而疏屈平。

屈平疾王听之不聪也，谗谄之蔽明也，邪曲之害公也，方正之不容也，故忧愁幽思而作离骚。离骚者，犹离忧也。夫天者，人之始也；父母者，人之本也。人穷则反本，故劳苦倦极，未尝不呼天也；疾痛惨怛，未尝不呼父母也。屈平正道直行，竭忠尽智以事其君，谗人间之，可谓穷矣。信而见疑，忠而被谤，能无怨乎？屈平之作离骚，盖自怨生也。上称帝喾，下道齐桓，中述汤武，以刺世事。明道德之广崇，治乱之条贯，靡不毕见。其文约，其辞微，其志洁，其行廉，其称文小而其指极大，举类迩而见义远。其志洁，故其称物芳。其行廉，故死而不容。自疏濯淖污泥之中，蝉蜕于浊秽，以浮游尘埃之外，不获世之滋垢，嚼然泥而不滓者也。推此志也，虽与日月争光可也。

其后，诸侯共击楚，大破之，杀其将唐眜。时秦昭王与楚婚，欲与怀王会。怀王欲行，屈平曰：“秦，虎狼之国，不可信，不如毋行。”怀王稚子子兰劝王行：“奈何绝秦欢！”怀王卒行。入武关，秦伏兵绝其后，因留怀王，以求割地。怀王怒，不听。亡走赵，赵不内。复之秦，竟死于秦而归葬。

长子顷襄王立，以其弟子兰为令尹。楚人既咎子兰以劝怀王入秦而不反也。屈平既嫉之，虽放流，眷顾楚国，系心怀王，不忘欲反。

令尹子兰闻之，大怒。卒使上官大夫短屈原于顷襄王。顷襄王怒而迁之。屈原至于江滨，被发行吟泽畔，颜色憔悴，形容枯槁。渔父见而问之曰：“子非三闾大夫欤？何故而至此？”屈原曰：“举世皆浊而我独清，众人皆醉而我独醒，是以见放。”渔父曰：“夫圣人者，不凝滞于物，而能与世推移。举世混浊，何不随其流而扬其波？众人皆醉，何不哺其糟而啜其醨？何故怀瑾握瑜，而自令见放为？”屈原曰：“吾闻之，新沐者必弹冠，新浴者必振衣。人又谁能以身之察察，受物之汶汶者乎？宁赴常流而葬乎江鱼腹中耳。又安能以皓皓之白，而蒙世之温蠖乎？”乃作《怀沙》之赋。于是怀石，遂自投汨罗以死。