限时训练一
2020高考英语江苏专用版考前冲刺5周限时练辑：限时训练(一) Word版含解析
限时训练(一)Ⅰ.单项填空1.Without the wise leadership of the Party，it hard to achieve the GDP growth target for 2022.A.would have beenB.would beC.wereD.had been答案 B解析考查虚拟语气。
句意为：要是没有党的英明领导，很难实现2022年国内生产总值增长的目标。
此处without短语相当于虚拟条件句，根据题干中的“2022”判断是对将来的虚拟，主句用would＋do的形式，故B项正确。
2.Parents’top priority is to help their kids develop the ability to show in their choices of friends.binationB.admirationC.inspirationD.discrimination答案 D解析考查名词词义辨析。
combination结合；admiration钦佩；inspiration灵感；discrimination 区别，识别。
句意为：父母的首要任务是帮助他们的孩子发展在选择朋友时的识别能力。
根据句意可知D项正确。
3.As Emerson puts it，we travel the world over to find the beautiful，we must carry it with us or we find it not.A.unlessB.untilC.thoughD.because答案 C解析考查连词词义辨析。
句意为：如爱默生所言，我们环游世界是为了寻找美，但是我们必须与美同行才能发现它。
unless除非；until直到；though尽管；because因为。
根据句意可知，这里表示一种让步关系，故选C。
4.I felt like giving up.I probably ，but my Dad whispered，“Come on! You can make it.”A.would haveB.wouldC.shouldD.should have答案 A解析考查过去将来时。
限时训练(一)字音(第二课时)
限时训练(一)字音(第二课时)1．下列词语中加点的字，每对读音完全相同的一组是( )A．.笼．罩／笼．络弄．堂／舞丈弄．墨答．谢／一问一答．B．慰藉．／狼藉．收拾．／拾．级而上渐．染／东渐．于海C．丧．礼／丧．胆兴．奋／夙兴．夜寐悄．寂／悄．声细语D．泥．墙／拘泥．散．布／烟消云散．省．亲／不省．人事答案：D答题指要：泥(nì)，散(sàn)，省(xǐng)。
A．弄(lîng)堂／舞文弄(nîng)墨；B．慰藉(jiâ)／狼藉(jí)，收拾(shí)／拾(shâ)级而上；C．丧(sāng)礼／丧(sàng)胆。
2．下列各组词语中加点的字是多音字，其中有两种读音的一组是（）A．宁．愿宁．缺毋滥宁．死不屈宁．折不弯宁．为玉碎B．间．谍挑拨离间．亲密无间．黑白相间．间．接经验C．匀称．称．心如意称．孤道寡啧啧称．奇拍手称．快D．面相．相．机行事相．貌堂堂吉人天相．相．时而动答案：C答题指要：C “称心如意”“匀称”中的“称”读chân，其它读chēng；A、n ìng；B、jiàn； D、xiàng。
3．下列词语中加点的字，每对的读音完全相同的一组是（）A．徇．私/驯．熟咆哮．/肖．像惬．意/提挈．连咳．带喘/金蝉脱壳．B．偈．语/鲫．鱼畏葸．/玉玺．胴．体/栋．梁耆．年硕德/骐．骥一跃C．投奔．/奔．命着．急/着．火给．养/给．以强．词夺理/强．人所难D．丧．气/沮丧．殷．实/殷．红反省．/省．悟罪不当．罚/独当．一面答案：B答题指要：A、“徇”、“驯”读xùn；“哮”、“肖”读xiāo；“惬”、“挈”读qiâ；“咳”读kã；“壳”读qiào。
B、“偈”、“鲫”读jì；“葸”、“玺”读xǐ；“胴”、“栋”读dîng；“耆”、“骐”读qí；C、“奔”读bân；“给”分别jǐ、gěi；“着”读zháo；“强”读qiǎng。
中考数学选择填空限时训练(一)
)E Al)( )DL B T C Mx)A. (2 , 3) B5 •把不等式组8已知关于 该抛物线上的是（ B10 .如图 X 1 - 7 A. 4 B . 6 C . 8 D . 10(0 , 3) C . ( -1 , 3) D . ( -3, 3)图 X 1- 4匀速运动，终点为 C,过运动路线上任意一点 P 作PMLx 轴于M PNLy 轴于N,设四边形OMP 的面积为S, P 点运动的时间为 于t 的函数图象大致是B图 X 1-6图 X 1- 5( )则AE 的长为（( )图 X 1- 7正方形ABCD 勺边长为6,点E,7.如图X 1-4，在?ABC ［中，用直尺和圆规作/ BAD 勺平分线AG 交BC 于点E 若BF = 6, AB= 5A. 10 B . 3 C . 4 D . 5t ，则S 关-io-i B 图 X 1-3A. 0 B . 1 C. .2 D . 2 x> — 1 ,的解表示在数轴上，下列选项正确的是x + 2<36•在Rt △ ABC 中，两直角边的长分别为 6和8,则其斜边上的中线长为 A. 2 ,10 B . 3k9•如图X 1 -5,已知AB 是反比例函数y = x （k >0,x >0）图象上的两点，BC" x 轴，交y 轴于点C 动点P 从坐标原点0出发，沿 x 的方程ax + b = 0（a ^0）的解为x =- 2,点（1 , 3）是抛物线y =ax 2 + bx + c （a ^0）上的一个点，则下列四个点中一定在）6590000人次.将6590000用科学 D . 6.59 X 10 65 C. | ■ 10 D. 10 52. 如图X 1- 1，下面几何体的俯视图是（3. 据统计，2015年广州地铁日均客运量约为 记数法表示为（ ）A . 6.59 X 104 B . 659 X 1044•已知一组数据0，— 1, 1 , 2, 3，则这组数据的方差为（ A.2 B . - 2 C . 2 D . - 1C . 65.9 X 105 F 分另U 在AB AD 上，若CE= 3砺，且/ EC = 45°, _则CF 的长为（选择填空限时训练（一）（限时30分钟 满分54分） -、选择题（本题共10小题，每小题3分，共30分）1 .-2的相反数是（）二、填空题（本题有6小题，每小题4分，共24分）11 •请写出一个解为x= 1的一元一次方程： ________12 .如图X1 - 8是一个斜体的“土”字，AB// CD已知/ 1 = 75°,则/2= ____________图X1- 813 •为了了解某毕业班学生的睡眠时间情况，小红随机调查了该班15名同学，结果如下表:每天睡眠时间（单位：小时）77.588.59人数24531则这1514. 如图X1 -9,将弧长为6 n的扇形纸片AOB S成圆锥形纸帽，使扇形的两条半径0A与0B重合（粘连部分忽略不计），则圆锥形纸帽的底面圆半径是 _________ .a b15. 如图X1 -10,已知点B D在反比例函数y=-（a>0）的图象上，点A, C在反比例函数y = -（b<0）的图象上，AB// CD// x轴，ABX —AB= 4, CD= 3, AB与CD间的距离为1，贝U a- b的值是 ______16. _______________________________________________________________________________ 如图X1 - 11，点A（2 , 0），以0A为半径在第一象限内作圆弧AB使/ A0= 60°,点C为弧AB的中点，D为半径0A上一动点（不与点0 A重合），点A关于直线CD的对称点为E若点E落在半径0A上,则点E的坐标为______________________________________________________________ ;若点E落在半径0B上，则点E的坐标为_________ .计算：1| 3-2| + 20170-( -3) -1+ 3tan30 ° +8.CD在—轴的同侧,图X1- 10参考答案1. C 2.A 3.D 4.D 5.B6. D7.C8.D9.B 10.A11.x - 1 = 0(答案不唯一)12.10513. 8 8 14.3 15.1216. (2 3 - 2, 0) (.3 - 1, 3 - 3)加加练解：原式=2- .3+ 1 -( -3) +3X。
地理限时训练(一)【建议时间15分钟】
地理限时训练（一）【建议时间15分钟】
使用日期：选题：张毅老师批阅人：得分：姓名： 1.
读“地质构造示意图”，完成下列问题。
（14分）
（1）从地质构造上看属于向斜的字母是，属于地堑的字母是。
（2）出现图中“背斜成谷，向斜成山”这一地形倒置现象是受到（内力/外力）作用；
关于这一现象叙述正确的是。
（双选）
①向斜槽部受挤压力的作用岩层坚实不易侵蚀形成的山地
②背斜槽部受挤压力的作用岩层坚实不易侵蚀形成的谷地
③向斜顶部受张力的作用岩层脆弱受外力侵蚀形成的山地
④背斜顶部受张力的作用岩层脆弱受外力侵蚀形成的谷地
（3）若开采地下水，最好在处；若为开采方便，采石场最好选择处（填字母）。
2.读六大板块示意图，完成下列问题。
（16分）
（1）图中表示美洲板块的是（序号）；⑥表示的板块名称是（名称）；
（2）日本群岛是_____板块（序号）和_____板块（序号）（张裂/挤压）形成的，其位于板块的______（生长/消亡）边界附近，地壳较为活跃，故其多、等地质灾害。
注：本次测验选自于2014年重庆一中高2017级高一上期第三次定时练习（2014.12）背诵要点收获：
地理限时训练（一）【参考答案】
1.
2.(每空2分，共16分)
(1) ______⑤__ ____，南极洲板块。
(2) _______①______，_____②________，_____挤压______，
_____消亡__ ___，_____火山______，_____地震______
（注：第2小题：1和2、5和6答题顺序可互换）。
2021届江苏省常州市金沙高级中学高三下学期限时训练(一)英语试题(解析版)
江苏省常州市金沙高级中学2021届高三下学期限时训练（一）英语试题第一部分：阅读理解（共两节，满分30分）第一节（共7个小题：每小题2.5分，满分17.5分）AWhat do the random, scribbled(潦草的)drawings crowding the margins(页边空白)of most high school students’ papers mean? When a student is caught doodling(乱画)in class, he will probably be criticized for daydreaming. But doodling while listening can help with remembering details, rather than implying that the mind is wandering, according to a study published in the scientific journal Applied Cognitive Psychology.In an experiment conducted by the Medical Research Council’s Cognition and Brain Sciences Unit in Cambridge,40 subjects were asked to listen to a two-minute tape giving several names of people and places. Half of the participants were asked to shade in shapes on a piece of paper at the same time, without paying attention to neatness, while the rest were given no such instructions. After the tape had finished, all participants in the study were asked to recall the names of people and places. The doodlers recalled on average 7.5 names of people and places, compared to only 5.8 by the non-doodlers.“If someone is doing a boring task, like listening to a dull telephone conversation, they may start to daydream.” said study researcher, Professor Jackie Andrade, of the School of P sychology, University of Plymouth. “Daydreaming distracts them from the task, resulting in poorer performance. A simple task, like doodling, may be enough to stop daydreaming without affecting performance on the main task.”“In psychology, tests of memory or attention will often use a second task to selectively block a particular mental process. If that process is important for the main task, then performance will be weakened. But my research suggests that in everyday life doodling may be something we do because it helps to keep us on track with a boring task, rather than being an unnecessary distraction(分心)that we should try to resist doing.” said Andrade.Dan Ware, a social study teacher, used to consider doodling a distraction from learning, butafter teaching kids with all personality types he learned scribbling away during lectures helps certain students remember more information. “In my first few years of teaching, I thought, ‘Well, this kid isn’t paying attention. He’s daydreaming.’ But I had some real ly powerful experiences with students and came to understand in many cases that was their way of focusing, and those students were probably paying more attention than other students.” Ware said.1. What do we know about the participants involved in the experiment?A. Some were asked to note down the information neatly.B. Some were asked to memorize the names they would hear.C. Some were instructed to listen to the tape with full attention.D. Some were instructed to make random drawings on paper.2. Which of the following will both Jackie Andrade and Dan Ware agree with?A. Doodling helps some people focus.B. Doodling makes a dull task interesting.C. Students who doodle perform poorly.D. Students who doodle lack concentration.3. What is the best title of the text?A. Daydreaming Can Sharpen Study SkillsB. Doodling Can Help Memory RecallC. A Wandering Mind Improves ProductivityD. Distractions Harm Academic PerformanceBShyness is the cause of much unhappiness for a great many people. Shy people are anxious and self-conscious; that is, they are concerned about their own appearance and actions too much. Negative thoughts are constantly occurring in their minds: What kind of impression am I making? Do they like me? Do I sound stupid? Am I wearing unattractive clothes?It is obvious that such uncomfortable feelings must affect people unfavorably. A person’s self-concept is reflected in the way he or she behaves and the way a person behaves affects other people’s reactions. In general, the way p eople think about themselves has a deep effect on all areas of their lives.Shy people, who have low respect, are likely to be passive and easily influenced by others. They need faith that they are doing ＂the right thing＂. Shy people are very sensitive to criticism. It makes them feel inferior(自卑). They also find it difficult to be pleased by praises because they believe they are unworthy of praise. A shy person may respond to a praise with a statement like this one: ＂You’re just saying that to make me feel good. I know it’s not true.＂It is clear that,. while self-awareness is a healthy quality, overdoing it is harmful.Can shyness be completely got rid of, or at least reduced? Fortunately, people can overcomeshyness with determination since shyness goes hand in hand with lack of self-respect. It isimportant for people to accept their weaknesses as well as their strengths. Each one of us has hisor her own characteristics. We are interested in our own personal ways. The better we understandourselves, the easier it becomes to live up to our chances for a rich and successful life.4. The first paragraph is mainly about ____________.A. the cause of shynessB. the effect of shyness on peopleC. the feelings of shy peopleD. the questions in the minds of shy people5. According to the writer, self-awareness is ____________.A. harmful to peopleB. a weak point of peopleC. the cause of unhappinessD. a good characteristic6. What is the shy people’s reaction to praise?A. They are pleased by it. B They feel it is not true.C. They are very sensitive to it.D. They feel they are worthy of it.7. We can learn from the passage that shyness ____________.A. blocks our chances for a successful lifeB. helps us to live up to our full developmentC. enables us to understand ourselves betterD. has nothing to do with lack of self-respect第二节（共5小题，每小题2.5分，满分12.5分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
高一上学期语文 限时训练 一含答案
高一语文第一次限时训练一、客观题1．下列词语中加点字的读音，完全正确的一项是（）A．彷（páng）徨青荇（xìng）遒劲（jìn）颓圮（qǐ）B．长篙（gāo）漫溯（sù）青苔（tāi）火钵（bō）C．愤懑（mǎn）冰屑（xuè）麦糟（zāo）叱（chì）骂D．袒露（lù）隽（juàn）永碣（jié）石忸怩（ní）2．下列词语中，没有错别字的一组是（）A．凄婉漂泊褒扬击浊扬清B．斑斓笙萧抨击剑拔驽张C．榆阴气概瓦菲意气风发D．讴歌扭扣寥廓天伦之乐3．下列句子中，成语使用恰当的一句是（）A．袁弘表示，世上没有天生或是一蹴而就的坏人，自己会在饰演的这一版本的杨康中加深刻画其心理变化的过程，将其内心的迷茫和矛盾展现出来。
B．中日双方首脑同时以更加明确清晰的语言表示，解决东海共同开发问题倚马可待，现在剩下的可能就是技术层面或者事务层面的问题了。
C．日本捕鲸者不顾国际社会谴责，把非法捕捉到的鲸鱼屠宰、清洗、销售，以牟取暴利，血腥的一幕令人惨不忍睹。
D．房地产市场对宏观调控“免疫”，更深层的原因是市场制度存在重大的制度缺陷，若不从制度改革入手釜底抽薪，恐怕再多的“组合拳”和“重拳”都难以“拳拳到肉”。
4．下列各句中，没有语病的一句是（）A．由于这种思想上的局限性，使得韩愈的文体改革运动仅仅以模仿先秦诸子的散文为目标，而不能像先秦诸子和司马迁那样以接近人民口语为目标来创造新的散文。
B．这种如鱼得水似的悠闲，让后世的学者在感叹中国人融入西方社会的艰难时，不得不叹服徐志摩是“最适应西方生活的中国文人”。
C．在这一时期，毛泽东同志在长沙组织了湖南学生联合会、新民学会，开办了平民夜校、文化书社和湖南自修大学，参加了反对袁世凯称帝，领导了驱逐张敬尧等军阀。
D．行政处罚在程序上的公正、合理与否，将直接影响行政处罚的内容的有效和成立。
(原创)阅读理解限时训练一
适合年级：高二~高三建议用时：28—32分钟ADoraemon, Japan's robot cat from the future, will celebrate turning minus 100 years old by being given official residence of the city where he will be born, a city official told the reporters on Friday.The electronic blue feline（猫科动物）, whose cartoon exploits have captivated children across Asia, is to be given a residency certificate for Kawasaki, a city near Tokyo, on September 3, 2012，exactly a century ahead of his supposed birth.The city, in which the character's creator lived, is also home to a popular museum of all things of Doraemon and plans to issue copies of the time-travelling robot cat's residency certificate to fans and visitors."Doraemon was created and born in Kawasaki city. In that sense, he has always been a city resident," Mayor Takao Abe told reporters, according to the online edition of the local Kanagawa Shimbun newspaper."I hope (the residency certificate) will bring the museum closer to many people," he said.The certificate will give Doraemon's birthday as September 3, 2112, as well as listing his likes -- pastries（点心）-- and his dislikes -- mice.Doraemon was sent back in time from the 22nd century by a young boy who wanted to change his family's historical misfortune.His magic pocket provides an endless supply of fantastical small tools that help his young friend Nobita Nobi navigate the trials of everyday life.The character first appeared in manga strips（日本连环漫画）in 1969, making the transition to small and big screen over the following decades.Doraemon remains enormously popular in Japan, serving as an instantly recognisable cultural reference across generations.The cartoon series also has a large following in the rest of Asia, including in China and South Korea.【答案】1．C 2．B 3．A 4．B 5．C【解析】语篇解读:为了庆祝来自未来的日本机器猫哆啦A梦负100岁的生日，机器猫出生城市的一位政府官员上周五告诉记者说，哆啦A梦将注册成为该市的正式居民。
高一限时训练1定稿
高一化学限时训练（一）一、单项选择题1．在盛放浓硫酸的试剂瓶的标签上应印有下列警示标记中的2．某同学用托盘天平称量锌粒24.4g（1g以下用游码），他把锌粒放在右盘，砝码放在左盘，实际质量为A．24.4g B．25.5g C．23.6g D．24g3. 下列实验操作中正确的是A.手持试管给试管里的物质加热B.将鼻孔凑到集气瓶口闻气体的气味C.酒精灯的火焰可以用嘴吹灭D.一般用药匙或镊子取用固体药品4. 下列仪器用酒精灯加热时，需垫石棉网的是①烧杯②坩埚③锥形瓶④蒸发皿⑤试管⑥烧瓶A．②④⑤B．①②⑥C．③④⑥D．①③⑥5．下列分离或提纯混合物的方法正确的是A．在除去生石灰中的石灰石时，加水后进行过滤B．用过滤的方法除去碘水中的碘C．用乙醇萃取碘水中的碘D．用溶解过滤蒸发的方法除去固体BaCl2中的BaSO4 6．有人从市场上购得一瓶“纯净水”，喝过之后感觉有点苦涩味，怀疑是由深层地下水冒充的伪劣产品。
已知地下水含Ca2+、Mg2+等离子，家庭中的下列物品可用于验证他的推测的是A．纯碱B．食盐C．食醋D．食糖7．对下列实验过程的评价，正确的是A．某固体中加入稀盐酸，产生了无色气体，证明该固体中一定含有碳酸盐B．某溶液中滴加BaCl2溶液，生成白色沉淀，证明一定含有SO42-C．某无色溶液滴入紫色石蕊试液显红色，该溶液一定显碱性D．验证烧碱溶液中是否含有Cl-，先加稀硝酸除去OH-，再加入AgNO3溶液，有白色沉淀，证明含Cl-8．过滤后的食盐水仍含有可溶性的CaCl2、MgCl2、Na2SO4等杂质，通过如下几个实验步骤，可制得纯净的食盐水：①加入稍过量的Na2CO3溶液；②加入稍过量的NaOH溶液；③加入稍过量的BaCl2 溶液；④滴入稀盐酸至无气泡产生；⑤过滤。
正确的操作顺序是A．③②①⑤④B．①②③⑤④C．②③①④⑤D．③⑤②①④9．提纯含有少量硝酸钡杂质的硝酸钾溶液，可以使用的方法为A．加入过量碳酸钠溶液，过滤，除去沉淀，溶液中补加适量硝酸B．加入过量硫酸钾溶液，过滤，除去沉淀，溶液中补加适量硝酸C．加入过量硫酸钠溶液，过滤，除去沉淀，溶液中补加适量硝酸D．加入过量碳酸钾溶液，过滤，除去沉淀，溶液中补加适量硝酸10．实验室进行过滤和蒸发时，都要用到的仪器是A．烧杯B．玻璃棒C．蒸发皿D．酒精灯11. 某溶液中含有较大量的Cl－、 2CO、OH3-种阴离子，如果只取一次该溶液就能够分别将3种阴离3子依次检验出来，下列实验操作顺序中，正确的是①滴加Mg(NO3)2溶液；②过滤；③滴加AgNO3溶液；④滴加Ba(NO3)2溶液A．①②④②③B．④②①②③C．①②③②④D．④②③②①12. 下列实验操作中错误的是A．用规格为10 mL的量筒量取6 mL的液体B．用药匙或者纸槽把粉末状药品送入试管的底部C．过滤时玻璃棒的末端应轻轻靠在三层的滤纸上D．如果没有试管夹，可以临时手持试管给固体或液体加热13．进行过滤操作应选用的一组仪器是A．玻璃棒、滤纸、烧瓶、漏斗、铁架台B．滤纸、烧杯、试管夹、漏斗、玻璃棒C．漏斗、玻璃棒、烧杯、铁架台、滤纸D．烧杯、酒精灯、试管、铁架台、漏斗二、非选择题14．粗食盐中除含有钙离子、镁离子、硫酸根离子等可溶性杂质外，还含有泥砂等不溶性杂质。
限时训练1第一课时
限时训练(一)字音(第一课时)1．下列词语中加点字的注音全都正确的一项是()A．摭．拾(zhé)迷惘．(wǎnɡ)歇憩．(qì)开天辟．地(pì)B．甄．别(zhēn) 思忖．(cǔn) 蠕．动(rǔ) 恪．尽职守(kè)C．濡．染(rú) 熨．帖(yù) 肴馔．(zhuàn) 铩．羽而归(shā)D．迸．发(bènɡ) 麻痹．(bì) 犄．角(jī) 曝．背谈天(bào)答案：C解析：A项，“摭”读zhí；B项，“蠕”读rú；D项，“曝”读pù，只有在“曝光”一词中读bào。
2．下列词语中加点的字，读音完全正确的一项是()A．炽．热(chì) 蜷．曲(quǎn) 厝．火积薪(cuò) 色厉内荏．(rěn)B．谄．媚(chǎn) 伺．候(sì) 鞭辟．入里(pì) 暴殄．天物(tiǎn)C．木讷．(nè) 剽．悍(piāo) 引吭．高歌(hánɡ) 飞来横．祸(hénɡ)D．讥诮．(qiào) 翘．首(qiáo) 自怨自艾．(yì) 量．体裁衣(liànɡ)答案：D解析：A项，“蜷”读quán；B项，“伺”读cì，在表示“观察，守候”时才读sì；C 项，“飞来横祸”中“横”表示“突然的、意外的”，读作hènɡ。
3．下列各组词语中加点字的读音，有误的一项是()A．沮．丧(jǔ)诅．咒(zǔ)龃．龉(jǔ)狙．击(zǔ)B．犄．角(jī) 畸．形(jī) 绮．丽(qǐ) 涟漪．(yī)C．呐．喊(nà) 口讷．(nè) 纳．闷(nà) 蚊蚋．(ruì)D．谦．虚(qiān) 歉．收(qiàn) 嫌．弃(xián) 赚．取(zhuàn)答案：A解析：A项，“狙”读jū。
选择题限时训练(一)
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高三英语晚自习限时训练 (1)
高三英语晚自习限时训练一、阅读理解AFun things to do in high schoolLearn another languageYour school might be holding foreign languages classes, so this is a great way to start your language learning journey! If you want more self-paced learning, apps like Duolingo are easily accessible (可使用的) on our mobile phones. As our world becomes more in terconnected, it’s always good to learn another language or two.Aim for a semester (学期) of straight AThis can be a difficult task but not impossible to achieve, as long as you put in the right amount of work and effort. If you are struggling(挣扎)with your grades, you can host or join group studies with your classmates!Don’t be disheartened if you are not able to get an A in a semester. What’s important is having the drive to go forward. As a famous person once said, “He who would climb a ladder must begin at the bottom.Experience another cultureCulture and tradition are something that all humans share. No matter where we come from, we always bring our culture with us. People coming from different cultures may be among your friends or neighbors.You can go to a museum, read a book, or try new food in your area. Remember to keep an open mind and take the time to learn about them.Bring a shareable treat to classIf you know your way around the kitchen, you can impress your class by making and bringing them a delicious treat! Not only will this make their stomachs happy, but you’ll also bond (联系) the whole class together. Just don’t forget to check with your teacher first before bringing one.1. What should you do if you want to learn a language at your own speed?A．Go to a museum to read books. B．Attend another language class. C．Learn it on an app like Duolingo. D．Join group studies with your classmates.2. What’s the key if you can’t get an A in a semester?A．Keeping an open mind. B．Asking your teachers for help. C．Changing your study method. D．Having the drive to go forward.3. What will probably be the result if you bring a treat to class?A．Experiencing different cultures. B．Making your teacher angry and anxious. C．Making some students have a stomachache. D．Making your classmates happy and united.BIn large population studies, people who eat lots of fruits and vegetables high in vitamin C appear to have a reduced risk for various types of cancer, including cancers of the mouth and lung. But it’s not clear that these benefits come specifically from vitamin C．The Age-Related Eye Disease Study found that a daily supplement containing 500 mg of vitamin C can help slow the progress of macular degeneration, an age-related eye disease that causes vision loss. But we don’t know what benefits, if any, are provided by vitamin C in particular.Many people take vitamin C supplements in unnecessarily high doses to prevent or treat various conditions for which its effectiveness is unproved. The vitamin C supplements have variously been said for staving off sunburn and improving the appearance of wrinkles. None of these benefits have been confirmed in scientific studies.Perhaps the best-known and most widely promoted use of high-dose(高剂量)vitamin C is to prevent or treat the common cold. Most of the evidence shows that high-dose vitamin C will, at most, shorten a cold by one day. In ordinary circumstances, vitamin C has no preventive value, although a few studies have reported a 50% reduced risk of developing colds among people taking vitamin C in extreme circumstances-for example, skiers, marathon runners, and soldiers working in extreme conditions.The recommended vitamin C dosage per day for healthy women is 75 mg per day. For adults, the highest safe daily intake is likely to be 2, 000 mg per day. Vitamin C is water-soluble, so any amount more than you need will not be stored in the body. It’s safe in almost any amount from foods, and supplements in recommended amounts are also regarded as safe for most people. In some people, high doses-more than, say, 2, 000 or 3, 000 mg per day-can cause a variety of symptoms. People with kidney conditions should take no more than 1, 000 mg a day.；4. What can we learn about vitamin C in the first paragraph?A．It can be of better effect in higher doses.B．It can be a cure for age-related eye disease.C．It can help slow the progress of some illness.D．It can reduce the risks of the mouth cancer.；5. What function does vitamin C have intreating the common cold?A．It can help people save plenty of money.B．It can stop soldiers from catching a cold.C．It may reduce a cold by one day at most.D．It may prevent the common cold efficiently.；6. How much Vitamin C are healthy women advised to take per day?A．75 mg.B．500 mg.C．2, 000 mg.D．3, 000mg.；7. Where is this text probably taken from?A．An exam paper.B．A travel journal.C．An art guidebook.D．A science magazine.CThis year will have been the warmest in the UK, the Met Office has said. Although for many people the record from the year that attracted the most attention was that the summer heatwave reached 40. 3℃, the organization said that more significant was a figure 30 degrees lower-the average temperature over the course of the year.Although the exact temperature will need to be confirmed in the new year, the Met Office predicted that 2022 is going to exceed (超过)the previous record for the warmest annual average, which was 9. 88C in 2014. Apart from this month, every other month in the UK in 2022 was warmer than average. New Ye ar’s Day 2022 was the warmest on record, exceeding 16℃ in North Wales. Dr. Mark McCarthy, head of the National Climate Information Centre, said: “While many people will remember the summer’s extreme heat, what hurts people most, especially the elderly, this year is the relatively consistent heat through the year. ” Although this summer was the fourth warmest on record, it was the first in which the temperature exceeded 40℃.McCarthy said that we can expect to see increasingly warmer summers as a consequenc e of climate change. “The warm year is in line with the impacts we expect as a result of human-related climate change, ”he said. “Although it doesn’t mean every year will be the warmest on record, climate change continues to increase the chances of increas ingly warm years over the coming decades. ”Rebecca Newsom, head of politics at Greenpeace UK, said: “These aren’t the kind of records you want to be breaking. Record-breaking investment in the renewable technologies will get us out of this mess.At present though, Britain is ready for rain, with forecasters warning of difficult driving conditions caused by wet weather over the next few days. Although temperatures will stay mild for much of the UK, the Met Office warned that the rainfall will hit England and Wales this Saturday and Sunday.；8. What will make this year special in the UK?A．The most visitors will be attracted.B．The warmest year will take place.C．The biggest success will be achieved.D．The highest temperature will be 30℃.；9. What can be inferred from Paragraph 2?A．Every month in the UK was warmer than average.B．Next summer may be the first summer to exceed 40℃.C．Many elderly men may go to hospital for the high heat.D．New Year’s Day was the warmest on record in England.；10. What does Rebecca think of the future climate?A．Renewable energies can fight climate change well.B．Record of high temperature will be broken next year.C．Politicians should be responsible for the current mess.D．Warm summers are a consequence of human activities.；11. What is the weather like in Wales this weekend?A．Sunny.B．Snowy.C．Cloudy.D．Rainy.二、七选五阅读Since I’ve been living abroad, many different people have asked me to name typical British dishes. I have, however, struggled to think of an answer. Yes, we do have our own national dishes. 12Fish and chips, as you could guess, is made up of battered fish and chips. It is often accompanied by mushy peas (豌豆糊), which consists of peas mashed up to form a thick paste. The majority of British people really do love this dish but it is not something that we would eat, say, on a weekly basis. 13 British people associate this dish with the seaside and it’s something that will usually be eaten on a day trip there.14 This is made up of roast meat, usually chicken or beef, accompanied by roast vegetables and a meat sauce. It is usually eaten on a Sunday, perhaps for a special family dinner.Although we do have our traditional dishes, we do not eat these on a daily basis. On a daily basis many British people will eat rice or pasta dished. 15 You can see this by looking at the range of international foods in the supermarket or at the va riety of different restaurants you can find on our high streets.16 However, perhaps unlike other countries, we tend to prefer to cook recipes influenced by other cuisine.A．We eat them as the seasons change.B．But how much do we actually eat them?C．In conclusion, we do have our national dishes.D．Another favourite British dish is the roast dinner.E．Our diet has been greatly influenced by other countries.F．It’s also not usually something that you would cook at home.G．You’ll be served a traditional dish if you get invited for dinner at a British family’s home.三、完形填空The public library is one of the greatest inventions humankind has ever imagined and actually made happen. Libraries are a (an) 17 , quiet place where all people can hang out and read, without having to 18 anyone anything. Apart from being a place that is full of 19 to borrow, libraries are something that offers 20 and warmth. A post on Twitter celebrating the wonderfulness of libraries 21 this point perfectly.“Today a woman with developmental disabilities came into the library, and she was 22 ,” wrote a Twitter user. “She didn’t 23 her address, but her phone number was in her pocket on a piece of paper with Elmo on it. She kept saying, ‘The library is a safe place.’We called and her guardians (监护人) came right over. It seemed that they were not worried at all. Apparently this happens pretty 24 . They even stayed long enough for her to 25 some new books and Sesame Street DVDs. The library is a safe place indeed.”The post 26 others to share their own stories of libraries being safe places for them, and it’s enough to 27 even the hardest of hearts. For people who grew up in dysfunctional (功能失调的) homes, the library can be a safe heaven of calm and kindness. For people lacking financial means, the library is a space that provides free education and free entertainment, as well as a free indoor place to go. This is the reason why 28 people grouped to libraries when they have nowhere else on earth---the only place that doesn’t 29 money. We cannot understate Literal lifesavers. Libraries also fill up a lot of gaps in other social 30 and help people find their way to information about other opportunities. They open the doors to so many 31 .17. A．calm B．noisy C．nervous D．amusing18. A．ask B．pay C．afford D．beg19. A．supplies B．stationery C．books D．cafeterias20. A．support B．assistance C．shelter D．safety21. A．declared B．explained C．tackled D．discovered22. A．trapped B．lost C．anxious D．delighted23. A．know B．search C．conceive D．cover24. A．exactly B．accurately C．regularly D．fluently25. A．work out B．come out C．bring out D．check out26. A．spread B．inspired C．impressed D．contacted27. A．bother B．surprise C．fund D．warm28. A．heartbroken B．homeless C．hopeless D．elderly29. A．require B．quit C．recommend D．spend30. A．research B．communities C．services D．designs31. A．memories B．problems C．advertisements D．possibilities四、语法填空阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式When I was in the middle school, I founded a student club 32 (name) “green planet” inspired by Chai Jing’s documentary Under the Dome. At first people knew this club. As a result, we had only 15 members. And I 33 (laugh) at for being crazy. However, I didn’t lose heart and I insisted. Every day, we club y members broadcast weather reports and PM 2.5 levels. We then published articles and pictures of theserious 34 (pollute) of the city on the school website. Meanwhile, my club also shares suggestions 35 how to live a low carbon life on the school board, for example: take public transportation or car pool to school; do 36 (little) shopping and so on.37 time went by, more are what students showed great interest in our club.And luckily, I persuaded my headmaster to join us. After what seemed ages of waiting, the club was finally accepted by the majority of students in my school. An increasing number of students supported 38 (ours).Since then, we’re worked together 39 (promote) our club. And up to now, 85% of the students 40 (join) us and enjoyed the simple but eco-friendly life.Such is Joy, 41 responsible and persistent girl.五、应用文写作42. If you’re Li Hua. I’m going to plant trees by the river with my classmates this weekend. Please write an email to Nancy and invite her to join us.Contents include: 1. Gathering time and place;2. Activity arrangement and reminder;3. Lunch and return time.Limitations: 1. The number of words is about 100. 2. You can add appropriate details to make your writing coherent.参考答案1. C2. D3. D4. C5. C6. A7. D8. B 9. C 10. A 11. D12. B 13. F 14. D 15. E 16. C17. A 18. B 19. C 20. D 21. B 22. B 23. A 24. C 25. D 26. B27. D 28. B 29. A 30. C 31. D32. named33. was laughed34. pollution35. on/about36. less37. As38. us39. to promote40. have joined41. a42. Dear Nancy,My classmates and I are planning to plant trees by the river this weekend. We all hope you can join us. Here is the schedule.We are to meet at the school gate at 8 o'clock this Saturday morning. Since we'll cycle there and work in the field, you'd better wear casual clothes and comfortable shoes. It would be much better if you could bring some necessary tools. Besides, we'll have a picnic there. Everyone is expected to bring their lunch and share it. Maybe we will return at around 3 o'clock in the afternoon.Would you like to join us? Hope to see you then.Yours,Li Hua。
湖北省恩施市一中(理科)限时训练(一)试题与答案
高二(下)数学（理科）限时训练（一）答案高二(下)数学（理科）限时训练（一）考试范围：椭圆；考试时间：2014年02月14日；命题人：田超学校：___________姓名：___________班级：___________考分：___________ 一．选择题（每题5分，满分30分）1、椭圆的离心率为（）A．B．C．D．2、已知椭圆长轴长、短轴长和焦距成等差数列，则该椭圆的离心率是()A．B．C．D．3、过椭圆的左焦点作直线交椭圆于两点，是椭圆右焦点，则的周长为（）A．B．C．D．4、已知,是椭圆的两个焦点，若椭圆上存在点P，使得,则椭圆的离心率的取值范围是（）A．B．C．D．5、椭圆＝1的左右焦点分别为、，点是椭圆上任意一点，则的取值范围是( )A．B．C．D．6、椭圆C:的左右焦点分别为F1,F2,P为椭圆上异于端点的任意的点，PF1,PF2的中点分别为M,N,O为坐标原点，四边形OMPN的周长为2，则△的周长是（）A．B．C．D．二，填空题（每题5分，满分20分）7、已知P为椭圆上一点，F1,F2是椭圆的焦点，∠F1PF2=900,则△F1PF2的面积为___________;8、若过椭圆＝1内一点(2,1)的弦被该点平分，则该弦所在直线的方程是______9、如图，是椭圆在第一象限上的动点，是椭圆的焦点，是的平分线上的一点，且，则的取值范围是 .10、已知当取得最小值时，直线与曲线的交点个数为11、（满分14分0已知椭圆过点，且离心率．（1）求椭圆的标准方程；（2）是否存在过点的直线交椭圆于不同的两点M、N，且满足（其中点O为坐标原点），若存在，求出直线的方程，若不存在，请说明理由．1.A【解析】试题分析：根据题意，由于，可知a=2，b=1,那么可知，故可知结论为，选A.考点：椭圆的性质点评：主要是考查了椭圆的几何性质的运用，属于基础题。
2.B【解析】试题分析：椭圆长轴长、短轴长和焦距成等差数列，即2a,2b,2c成等差数列，所以，，又，所以，，选B。
高一英语(下)限时训练(一)
高一英语（下）限时训练（一）I. 听力部分（共20题，每小题1分，满分20分）第一节（共5小题，每小题1分，满分5分）1.Whom the man is talking to probably？A．A bus conductor B. A clerk at the airport C. A taxi driver2. What time does the man eat breakfast?A．At 6:35 B. At 6:45 C. At 7:103. How will the man go to New York?A. By trainB. By planeC. By car4. What does the man mean?A. John Smith is not in.B. He himself is John Smith..C. Tina has dialed the wrong number.5. Which dress will the woman buy?A. The white oneB. The black oneC. The pink one第二节．（共15题，每小题1分，满分15分）听第六段材料，回答6-76. What is the relationship between the two speakers?A. Husband and wifeB. Teacher and studentC. Manager and secretary7. What will not the man do ?A. Fold the dry clothesB. Feed the baby dogC. Wash the dirty clothes听第七段材料，回答8-108. What will Ben do this Sunday?A. Go shoppingB. Have a business tripC. Attend the clothing show9. What are they NOT allowed to do during the show?A. Take photos of clothesB. Try on the clothesC. Buy the clothes they like10. What time should they get there ?A. at 4:10B. at 4:50C. at 5:10听第八段材料，回答11-1311. What do we know about Susanna?A. She is a girl from BeijingB. Her birthday is on National DayC. She studied in Beijing last year12. How long will Susanna‟s friend stay in Beijing?A. about 8 daysB. about 5 daysC. About 3 days13. Who will meet Susanna …s friend ?A. The womanB. The manC. The man‟s cousin听第九段材料，回答14-1614. Why does not the man choose the red handbag？A. Because he thinks it is too expensiveB. Because his mother does not like redC. Because the design does not suit his mother15. What color does the man‟s mother dislike?A. RedB. BlackC. White16. How much the man pay at last、A．99yuan B. 168 yuan C. 238 yuan听第10段材料，回答17-2017 What did the woman make the announcement for ?A. To tell the changes of the picnicB.To call for people to join the picnicC.To discuss the details of the picnic18. What do you know about the picnic last year？A. They had a bad picnicB. The weather was sunnyC. Many people joined it19. Who will join the activity for free?A. Children who are under 5B. Club members who take some foodC. People who take their family20. The Smith (4 people ) are non-members bringing no food. How much should they pay?A. $ 20B. $ 30C. $40II. 单项选择（共15题，每小题1分，满分15分）21. —I'm sorry I can't accept _____ price offered. —Well, I'm sure you can't find _____ better bargain.A. a; aB. the; theC. the; aD. a; the22. I have read the material several times but it doesn‟t seem to make any ______ to me.A. meaningB. senseC. significanceD. importance23. Will you please write the words ________? I mean you write them on the first line and then the thirdline and so on.A. every other linesB. every third lineC. every a few linesD. every two lines24. The boy has a gift _____music and plays the violin wonderfully, ______ his parents are very proud.A. for, of whichB. at, of whichC. of, in whichD. in, in which25. We have a spare bedroom which also____as a study where my husband can concentrate on hisresearch.A. usesB. functionsC. designs D works26. --- I don‟t know why the manager was absent from yesterday‟s meeting.--- He must have been sick, _________?A. mustn‟t heB. isn‟t heC. wasn‟t heD. didn‟t he27. Lots of coal miners died on the job last year, ______ the local government to shut nearly 100 smallminers in this county.A. forcedB. to forceC. forcesD. forcing28. Can you imagine _______ while he appears so gentle?A. his treating his wife badlyB. his being badly treatedC. he treat his wife badlyD. he should be treated badly29. When you start an ad campaign, it‟s important to always try to ______ the audience in order to getthem to react in a certain way.A. apply to B appeal to C. come to D. contribute to30. I just can‟t _______ why he betrayed me when we had been friends for so many years.A. point outB. turn out C work out D. figure out31.Sophia waited for a reply, but _________ came.A. eitherB. anotherC. neitherD. none32. The president hopes that the people will be better off when he quits(离任)than when he __________.A. has startedB. startsC. startedD. will start33. ---- When shall we meet your cousin at the airport?---- His plane took off an hour ago, and it ______ reach at 5 o‟clock.A. mustB. wouldC. couldD. should34. The decision ________ giving lessons during vacations and weekends should be banned is________the Education Department of Jiangsu Province has made.A. whether; whatB. why; thatC. that; thatD. that; the one35. Not only _____ the importance of protecting the environment but also _____ others to keep thesurroundings clean.A. did he realize; did he teachB. did he realize; he taughtC. realized he; did he teachD. he realized; he taughtIII. 完形填空（共20题，每小题1分，满分20分）Have you ever dreamed about sending a letter to yourself or your friends in the future? While express mail represents efficiency and speed and is popular in China, there is another type of mail emerging（出现）as a new business—" 36__ mail"."The letter should be delivered next Mother‟s Day and not a day earlier!" Lin Xiaofan, a senior high school student in Hefei, instructs one of the companies 37 the service.Lin Xiaofan wrote the letter to her mother 38 to express her love to her mother for next Mother‟s Day."Offering this service makes people 39 and let them understand the meaning of 40 in another way," said Zheng Zhimin, manager at a "future mail" company in Hefei. Zheng thinks "future mail" letters are "reminders of affection, 41 , and love."Feng Xiao, a youth who feels pressure 42 some achievement in her career, decided to write a letter to 43 on her 25th birthday and have it delivered five years later on her 44 birthday through a "future mail"."I expressed my thoughts about my 45 life and my expectations for the future to encourage myself to 46_ up to the challenges of my life with courage," Feng said.While "future mail" is gaining popularity, some are concerned about what happens if the postal__47__ of the receiver changes or if the company 48 before letters are delivered.Zheng said customers are required to 49 an acceptance form and make an assessment so they can be compensated（补偿）if their letters or goods are lost or damaged."I won‟t be too disappointed 50 I cannot receive my letters, because for me what is more important are the 51 when I write the letter," said Zhu Min, who works for a foreign company in Shanghai.Most of the business‟52 are college students and young white-collar workers. Most people 53 their hopes and wishes in the letter so they can 54 the connection between the past and the present 55 they receive the letter. It can help people understand the meaning of “time”.36. A. future B. present C. past D. immediate37. A. supplying B. bringing C. holding D. offering38. A. without hesitation B. without delay C. in advance D. on time39. A. slow down B. speed up C. hurry up D. hesitate at40. A. love B. letter C. time D. money41. A. championship B. friendship C. reflection D. connection42. A. despite B. spite of C. because of D. instead of43. A. Parents B. her C. Mother D. herself44. A.25th B. 35th C. 30th D. 20th45. A. current（现在的）B. early C. later D. future46. A. reach B. look C. search D. face47. A. name B. address C. age D. figure48. A. goes broke B. goes forward C. goes up D. grows up49. A. buy B. compete C. complete D. bring50. A. as if B. even if C. so that D. now that51. A. words B. contents C. secrets D. feelings52. A. workers B. managers C. customers D. employees53. A. put B. draw C. expect D. get54. A. predict B. experience C. inspect D. research55. A. so B. although C. when D. forIV. 阅读理解（共15题，每小题2分，满分30分）AThe film Avatar has been a hit at the box office in the UK and around the world, becoming the fastest film ever to earn $1bn (7bn yuan) in ticket sales.But the world of the sci-fi（科幻小说的）epic（叙事诗）Avatar is so perfect that people have admitted being troubled by depression（沮伤）and suicidal（自杀的）thoughts at not being able to visit the planet.Set in the future when Earth‟s resources have run out, director James Cameron‟s film tells the story of a corporation trying to mine a rare mineral.The humans conflict with the natives—a peace-loving race of 7ft tall, blue-skinned creatures called the Na‟vi, who exist in perfect harmony with nature.Fans have flooded the internet with their confused feelings. On the site Avatar Forums（论坛）, the topic “Ways to cope with the depression of the dream of Pandora being intangible（触摸不到的）” has more than 1,000 posts.In a similar forum, one user wrote, “When I woke up this morning after watching Avatar for the first time yesterday, the world seemed grey. It just seems so meaningless.”“I still don‟t really see any reason to keep doing things at all. I live in a dying world.”On another site, one fan was even more affected, admitting, “I even consider suicide, thinking that if I do it I will be rebirthed in a world similar to Pandora.”On the Avatar site Naviblue, a fan calling himself Jorba has even asked others to join him in starting a real Na‟vi tribe（部落）.Dr Stephan Quentzel, psychiatrist（精神病医生）and Medical Director in New York told CNN, “Virtual life is not real life and it never will be, but this is the pinnacle（极点）of what we can build in a virtual presentation so far.”“It has taken the best of our technology to create this virtual world and real life will never be as utopian（空想的）as it seems on screen. It makes real life seem more imperfect.”But not everyone viewing the film has been hit by the “Avatar Blues”, as a small but vocal（发嗓音的）group have claimed it contains racist（种族主义的）themes—the white hero once again saving the primitive（原始的）natives. Since the film opened three weeks ago, hundreds of blog posts, newspaper articles and YouTube videos have said things such as the film is “a fantasy about ra ce told from the point of view of white people” and that it strengthens “the white Messiah fable（寓言）.”The film‟s writer and director, James Cameron, says the real theme is about respecting others‟ differences.56. According to the passage, which of the following is TRUE?A. The audience think the theme of the film is showing respect to others‟ differences.B. The perfection created in the film makes some viewers think of committing suicide.C. Most of the viewers think the film focuses on racism.D. The film shows the humans are in harmony with nature.57. It can be inferred from the passage that _______.A. the director makes full use of hi-tech to create the virtual world in the filmB. fans voice their feelings on the InternetC. some viewers criticized racism described in the filmD. some viewers even want to create a real Na‟vi tribe58. The best title of the passage is ________.A. Avatar—A Perfect FilmB. Avatar—A Reflection of Real LifeC. Avatar’s Setting Causing Real Life ImperfectD. Avatar’s P erfection Causing DepressionBEast Hampton Fine Arts FestivalDate: July 4-6, 2010Time: 10:00 am-6:00 pmEast Hampton Fine Arts Festival features （以…为特色）America‟s top artists and is one of the highest quality juried show on Long Island. Learn about their inspiration（灵感）and skills. The Festival offers a full range of arts, including painting, photography, glass, and more.$9.00 Adults / $7.00 Seniors / $4.00 Students / Free for museum members and children under six Where: Montauk Highway (Rt.27), Amagansett, NY 631-421-1590Winzy Instant Winner SweepstakesWinzy is a search engine where you can win free prizes —every search on Winzy is a chance to win immediately! Just use Winzy to search the Web and you will be reminded if you have won an instant prize.Prize: Prizes vary each month —For example, current prizes include: Apple iPod Nano, Apple iPod Shuffle, $25 Gift Certificate for , $10 Gift Certificate for Female Babysitter WantedLocation: JohannesburgFemale babysitter wanted for one child aged 11 years for the following position:Mon-Fri: Fetch child from school (Benmore, Sandton) at 3:30 pm, drop off at my work or drop off at home (Florida Hills) and wait for me to come home at about 5 pm;Babysit for 3-6 hours every alternative（可供选择的）week / weekend (Florida Hills)—must be flexible.Must have a driver‟s license.Coastlife AdventuresLearn to surf on soft surfboards on the NSW South Coast. Surf lessons from beginners to advanced with qualified surf instructors and lifesavers. A variety of surf packages are available to suit everyone. Coastlife is famous for its new instructional method and high quality equipment. Surf classes operate daily on beaches between Tathra, Pambula and Merimbula. The beaches we teach on are rated as the safest in the area by Surf Lifesaving Australia.Tel: 02-6494-112259. If your grandparents take you and your sister aged 5 to the arts show after school, you should pay________.A. $29B. $22C. $20D. $1860. The second piece of information is intended to ______.A. advertise a search engineB. introduce a new websiteC. give prizes to customersD. sell some electrical products61. The person who wants to work as the babysitter described in the third ad must _____.A. have cooking skillsB. be a qualified driverC. have childcare experienceD. be patient and enthusiastic62. To learn surf lessons, Coastlife will provide you with _______.A. a one-to-one teaching planB. free high quality equipmentC. the best beach free of dangerD. new skills of surfing on soft surfboardsCIn modern society there is a great deal of argument about competition. Some values it highly, believing that it is responsible for social progress and prosperity（繁荣）. Others say that competition is bad because it sets one person against another and it leads to unfriendly relationships between people.I have taught many children who held the belief that their self-worth relied on how well they performed at tennis and other skills. For them, playing well and winning are often life-and-death affairs. In their single-minded pursuit（追求）of success, the development of many other human qualities is sadly forgotten.However, while some seem to be lost in the desire to succeed, others take an opposite attitude. In a culture which values only the winners and pays no attention to the ordinary players, they strongly blame competition. Among the most vocal are youngsters who have suffered under competitive pressures from their parents or society. Teaching these young people, I often observe in them a desire to fail. They seem to seek failure by not trying to win or achieve success. By not trying, they always have an excuse, “I may have lost, but it does n‟t matter because I really did n‟t try.” What is not usually admitted by themselves is the belief that if they had really tried and lost, that would mean a lot. Such a loss would be a measure of their worth. Clearly, this belief is the same as that of the true competitors who try to prove themselves. Both are based on the mistaken belief that one‟s self-respect relies on how well one performs in comparison with others. Both are afraid of not being valued. Only as this basic and often troublesome fear begins to dissolve（消失）can we discover a new meaning in competition.63. What does this passage mainly talk about?A. Competition helps to set up self-respect.B. Opinions about competition are different among people.C. Competition is harmful to personal quality development.D. Failures are necessary experiences in competition.64. The underlined phrase “the most vocal” in Paragraph 3 means __________.A. those who try their best to winB. those who value competition most highlyC. those who are against competition most stronglyD. those who rely on others most for success65. What is the similar belief of the true competitors and those with a desire to fail?A. One‟s worth lies in his performance compared with others.B. One‟s success in competition needs great efforts.C. One‟s achievement is determined by his particular.D. One‟s success is based on how hard he has tried.66. Which point of view may the author agree to?A. Every effort should be paid back.B. Competition should be encouraged.C. Winning should be a life-and-death matter.D. Fear of failure should be removed in competition.DBe careful! Someone may use the truth to deceive. When he tells you something that is true, but leaves out important information that should be included, he can create a false impression.For example, someone might say, “I just won a hundred dollars on the lottery（彩票）. It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!”This g uy‟s a winner, right? Maybe, maybe not. We then discover that he bought two hundred tickets, and only one was a winner. He‟s really a big loser!He didn‟t say anything that was false, but he purposely left out important information. That‟s called a half-truth. Half-truths are not technically lies, but they are just as dishonest.Untrustworthy candidates in political campaigns often use this tactic. Let‟s say that during Governor Smith‟s last term, her state lost one million jobs and gained three million job s. Then she seeks（寻求）another term（任期）. One of her opponents（对手）runs an ad saying, “During Governor Smith‟s term, the st ate lost one million jobs!” That‟s true. However an honest statement would have been, “During Governor Smith‟s term, the state had a net（净）gain of two million jobs.”Advertisers will sometimes use half-truths. It‟s against the law to make false claims so they try to mislead you with the truth. An ad might boast（吹牛）, “Nine out of ten doctors recommend Yucky Pills to cure nose pimples（丘疹）.” It fails to mention that they only asked ten doctors and nine of them work for the Yucky Corporation.This kind of deception happens too often. It‟s a sad fact of life: Lies are lies, and sometimes the truth can lie as well.67. Which statement is true according to the article?A. Whenever people tell the truth, they are really lying.B. You can‟t trust gamblers（赌徒）.C. All governors help their states.D. The truth can be used in dishonest ways.68. The underlined word “deceive” in the first sentence means ________.A. removing one‟s teeth in publicB. ignore warningsC. foolD. repair69. The author clearly wants people to ________.A. think carefully about what they read and hearB. wear mismatched socks during political campaignsC. never trust anyoneD. vote for female candidates70. An appropriate title for this passage would be ________.A. Half-truthB. Everyone LiesC. Lying With the TruthD. Nose PimplesV. 单词拼写（共20小题；每小题0.5分，满分10分）1. Shelly has been preparing carefully for her physics examination so that she can be sure to pass it at her first a______.2. Of all the seven c , Asia is the biggest while Oceania is smallest.3. No matter how (频繁地)performed, Beethoven‟s works are still popular all over the world.4. P___________，I don‟t like this picture, though it suits your taste.5. It‟s bad manners to speak ill of others during their a__________.6. I was very glad that my cousin was a________ to Nanjing Normal University last autumn.7.To my extreme anger, he _________ (控告) me of stealing his money and clothes.8. At the meeting they discussed three different _________ ( 方法) to the study of mathematics.9 He left the place, _______(决心) never to come back again.10. Tom knows a great deal more about c___________(当代的) art than I do.11. Our production has _________(成倍增加).12. He is smart and diligent and has enough _______(信心) that he can pass the final exam with highgrades.13.He likes to b_________ with shop owners when he buys something.14.This medicine is p___________ if taken in large quantities.15.The design has to a_________ to all ages and social groups.16.I tried to p__________ my father to buy some shares, but he wouldn‟t.17.Sports are __________(有益的) to building our bodies.18.Some shops offer special d_________ of their goods on national holidays.19.Athletes around the world are trying to push the b_________ of human achievement.20.R_________ as an expert in poems, the man feels not a little proud.VI. 任务型阅读（共10小题；每小题1分，满分10分)If you are a skydiving beginner you'll need to read this article to learn which skydiving method to choose. There are three ways you can experience the thrill of skydiving and the only requirement is that you should be at least eighteen years old and have a weight of under 250 pounds. You also have to be free of any heart disease or severe medical conditions.Skydiving courses, in most cases, work the same way. A certified(有资格的) instructor will get you trained and he'll try to scare you and make you not jump. That‟s because the only thing he doesn't want is that a student panics while free falling. You'll then have to fill a lot of papers that you must go through if you want to jump. These documents make sure that if you get hurt the company will not be responsible. These are very scary but you‟ll have to sign them if you want to jump.When choosing the method you'll first skydive, you have to consider how much time you have and how much cash you've got. Of course, how brave you are is another factor and depending on these factors you‟ll have to choose one of three methods for your first jump. The methods are tandem（两人前后纵列）, static line and accelerated(加速) free fall. If what you want is to fly freely you have to go for accelerated free fall. Just want a nice ride, tandem might be the best choice. If you just want a quick ride you can go for static line.A good thing to take into consideration is videotaping your first jump, which costs from $ 50 to $100. You'll love looking back at how scared you were when jumping out of an airplane. If you choose to videotape your jump, another skydiver will jump before you do from the airplane and fly near you with acamera.VII. 书面表达（共1题，满分15分）假如你是班长，要组织主题班会，请你以“爱娱乐更爱学习”为主题，用英文写一篇发言稿。
2023-2024学年高一下学期英语限时训练-1 答案解析
高一英语限时训练 1答案解析阅读理解A）篇. 主题语境：人与社会——科学与技术本文是论说文。
一些科学家对人工智能的强大功能和快速发展表示了担心。
1. B。
理解主旨要义。
根据第二段中的Some recent models can ... Some can ... Others can ...可知，本段是对第一段最后一句Quite powerful AI tools have surprised even their creators with what they can do的延伸和展开说明，作者主要通过举例的方式介绍了当前人工智能工具的一些强大功能。
2. D。
理解目的。
根据第三段内容及第四段中的a more powerful model和The rapid progress and more general skills of recent AI models可知，作者在这里提到GPT-4是为了表明人工智能工具发展迅速。
3. C。
推断。
根据第四段中的many computer experts wrote an open letter calling for a six-month pause for any work on AI tools stronger than GPT-4和第五段内容可知，许多计算机科学家写公开信呼吁暂停人工智能工具研究，因为他们担心人工智能工具过于强大而不可控。
由此可推知，他们写这封信是为了减缓人工智能的发展。
4. D。
推断。
根据第六段内容可知，许多人工智能专家都不支持该信的观点：一些专家说这封信夸大了人工智能工具的能力；另一些专家说应该更关注当前人工智能工具的问题，而不是臆想未来会出现的问题。
B）篇主题语境：人与自然——自然生态本文是说明文。
科学家在南极海岸发现了一个新的帝企鹅群。
5. A。
理解具体信息。
根据第一段内容可知，由于帝企鹅的自然家园环境恶劣，人们无法接近一些企鹅群，这使得帝企鹅难以研究。
2019年秋人教版八年级上册数学限时训练一(含答案)
2019年秋人教版八年级上册数学限时训练一1．在下列长度的三条线段中，不能组成三角形的是( )A．2cm，3cm，4cm B．3cm，6cm，76cmC．2cm，2cm，6cm D．5cm，6cm，7cm2．已知一个三角形的两边长分别为8和2，则这个三角形的第三边长可能是（）A．4 B．6 C．8 D．103．下列图形中，不具有稳定性的是（）A．B．C．D．4．等腰三角形的周长为12,则腰长a的取值范围是( )A．a>6 B．a<3C．4<a<7 D．3<a<65．如图，在△ABC中，BC=8，AD为BC边上的高，A点沿AD所在的直线运动时，三角形的面积发生变化，当△ABC的面积为48时，AD的长为（）A．24 B．12 C．8 D．66．点P是△ABC内一点，且P到△ABC的三边距离相等，则P是△ABC哪三条线的交点（）A．边的垂直平分线B．角平分线C．高线D．中位线7．已知AD是△ABC的中线，且△ABD比△ACD的周长大3cm，则AB与AC的差为( )A．2cm B．3cm C．4cm D．6cm8．如图，ABC中，D、E分别是BC、AD的中点，若ABC的面积是18，则ABE的面积是（ ）A ．9B ．6C ．4.5D ．4二、填空题 9．已知一个三角形的三边长分别是2,3和x ，且此三角形的周长是偶数，则x 的值是______.10．如图，Rt △ABC 中，∠ACB ＝90°，△ABC 的三条内角平分线交于点O ，OM ⊥AB 于M ，若OM ＝4，S △ABC ＝180，则△ABC 的周长是_____．11．如图，在△ABC 中，AD 、AE 分别是边BC 上的中线与高，AE ＝4，△ABC 的面积为12，则CD 的长为_____．12．如图，Rt △ABC 中，∠C ＝90°，AD 为△ABC 的角平分线，与BC 相交于点D ，若CD ＝4，AB ＝15，则△ABD 的面积是_____．13．如图，在ABC ∆中，60B ∠=︒，AD 平分BAC ∠，点E 在AD 延长线上，且EC AC ⊥.若50E ∠=︒，则ADC ∠的度数是__________14．如图，BD ，CE 分别是△ABC 两个外角的角平分线，DE 过点A 且DE ∥BC.若DE ＝14，BC ＝7，则△ABC 的周长为____．三、解答题15．已知a ，b ，c 是三角形ABC 三边之长，化简：|a +b ﹣c |+|a ﹣b ﹣c |﹣|b ﹣a ﹣c |﹣|c +b ﹣a |．16．如图所示，已知△ABC ：①过A 画出中线AD ；②画出角平分线CE ；③作AC 边上的高BF17．如图，点P 是△ABC 内一点，比较BP +CP 与AB +AC 的大小．18．如图，在ABC ∆中，42A ∠=︒，70B ∠=︒，CE 平分ACB ∠，CD AB ⊥于D ，DF CE ⊥于F ，求EDF ∠.19．如图所示，在△ABC 中，已知点D ，E ，F 分别为边BC ，AD ，CE 的中点，且S △ABC＝4 cm 2，求△BEF 的面积．20．如图，△ABC的周长为24 cm，AD，BE分别是BC，AC边上的中线，AD，BE相交于点O，CO的延长线交AB于点F，且BD＝4 cm，AE＝3.5 cm，求AF的长．21．如图，∠ACB=90°，BD平分∠ABE，CD∥AB交BD于D，∠1=20°，求∠2的度数．22．如图，在△ABC中，AD⊥BC，CE⊥AB，垂足分别为D、E，已知AB＝6，AD＝5，BC＝4，求CE的长．23．材料阅读：如图①所示的图形，像我们常见的学习用品—圆规.我们不妨把这样图形叫做“规形图”.解决问题：（1）观察“规形图”，试探究BDC ∠与A ∠，B Ð，C ∠之间的数量关系，并说明理由；（2）请你直接利用以上结论，解决以下两个问题：Ⅰ.如图②，把一块三角尺DEF 放置在ABC △上，使三角尺的两条直角边DE ，DF 恰好经过点B ，C ，若40A ∠=︒，则ABD ACD ∠+∠=_____︒. Ⅱ.如图③，BD 平分ABP ∠，CD 平分ACP ∠，若40A ∠=︒，130BPC ∠=︒，求BDC ∠的度数.24．图()1是我们常见的基本图形，我们可以称之为“8”字形.“8”字形有一个重要的性质如下： A B C D.∠∠∠∠+=+利用这个性质并结合你所学的知识解决以下问题： ()1如图()1，A B 105∠∠+=，C 42∠=，直接写出D ∠的度数为______； ()2如图()2，若BN 、DN 分别是ABC ∠、ADC ∠的角平分线，BN 与DN 交于点N 、且A 55∠=，C 59∠=，求N ∠的度数；()3如图()3，若AM 、BN 、CM 、DN 分别是BAD ∠、ABC ∠、BCD ∠和ADC∠的角平分线，AM 与CM 、BN 交于点M 、G ，DN 与BN 、CM 交于点N 、H ，且AEB 54∠=，求M N ∠∠+的度数．答案1．C 2．C 3.D 4．D 5．B 6．B 7．B 8．C 9．3 10．9011．3 12．3013．100°. 14．2115．解：∵a，b，c为三角形的三边，∴a+b＞c，b+c＞a，a+c＞b，c+b＞a，∴a+b-c＞0，a-b-c＜0，b-a-c＜0，c+b-a＞0，∴原式=a+b-c+（b+c-a）-（a+c-b）-（c+b-a）=a+b-c+b+c-a-a-c+b-c-b+a=2b-2c．16．解如图所示：17．解：延长BP交AC于点E．在△ABE中AB+AE＞BE=BP+PE在△PEC中PE+EC＞PC相加得：AB+（AE+EC）+PE＞BP+PE+PCAB+AC＞BP+CP．18．解：∵∠A=42°，∠B=70°，∴∠ACB=180°-70°-42°=68°，∵CE平分∠ACB，∠ACB=34°，∴∠ACE=12∴∠FED=∠A+∠ACE=76°，∵DF⊥CE，∴∠EDF=90°-∠FED=14°，19．解∵E是AD的中点，∴S△BDE＝S△ABE＝S△ABD，S△CDE＝S△ACE ＝S△ACD，∴S△BEC＝S△BDE＋S△CDE＝S△ABD＋S△ACD＝S△ABC＝2 cm2.∵F是CE的中点，∴S△BEF＝S△BEC＝1 cm2.20．解∵AD，BE是△ABC的中线，∴BC＝2BD，AC＝2AE，CF是△ABC的中线，∴AF＝A B.∵BD＝4 cm，AE＝3.5 cm，∴BC＝8 cm，AC＝7 cm.∵△ABC的周长是24 cm，∴AB＝24－(BC＋AC)＝24－(8＋7)＝9 (cm)，∴AF＝×9＝4.5 (cm)．21．解∵BD平分∠ABE，∠1=20°，∴∠ABC=2∠1=40°，∵CD∥AB，∴∠DCE=∠ABC=40°，∵∠ACB=90°，∴∠2=90°-40°=50°．22．解∵AD ⊥BC ，CE ⊥AB ，∴S △ABC ＝12BC•AD ＝12AB•CE ， 即12×4×5＝12×6•CE ， 解得CE ＝103．． 23．解：（1）如图①，连接AD 并延长至点F ，根据外角的性质，可得BDF BAD B ∠=∠+∠，CDF C CAD ∠=∠+∠，又BDC BDF CDF ∠=∠+∠，BAC BAD CAD ∠=∠+∠，BDC A B C ∴∠=∠+∠+∠；（2）Ⅰ.由（1），可得BDC ABD ACD A ∠=∠+∠+∠； 又40A ∠=︒，90D ∠=︒，904050ABD ACD ∴∠+∠=︒-︒=︒，故答案为：50︒；Ⅱ.由（1），可得BPC BAC ABP ACP ∠=∠+∠+∠，BDC BAC ABD ACD ∠=∠+∠+∠，1304090ABP ACP BPC BAC ∴∠+∠=∠-∠=︒-︒=︒，又BD 平分ABP ∠，CD 平分ACP ∠，()1452ABD ACD ABP ACP ∴∠+∠=∠+∠=︒， 454085BDC ∴∠=︒+︒=︒.24．解：()1A B C D ∠∠∠∠+=+，A B 105∠∠+=，C 42∠=， D 1054263∠∴=-=，故答案为：63．()2如图2BN 、DN 分别是ABC ∠、ADC ∠的角平分线，13∠∠∴=，24∠∠=，又A 1N 2∠∠∠∠+=+，3N 4C ∠∠∠∠+=+，∴两式相减可得，A N N C ∠∠∠∠-=-，2N A C ∠∠∠∴=+， 即()1N A C 2∠∠∠=+，又A 55∠=，C 59∠=，N 57∠∴=； ()3如图3BN 、DN 分别是ABC ∠、ADC ∠的角平分线，ABG EBG ∠∠∴=，EDH CDH ∠∠=，又BAD ABG N EDN ∠∠∠∠+=+，EBG N CDH DCB ∠∠∠∠+=+， ∴两式相减可得，BAD N N DCB ∠∠∠∠-=-，2N BAD DCB ∠∠∠∴=+， 即()1N BAE DCE 2∠∠∠=+， 同理可得，()1M ABE CDE 2∠∠∠=+， 又AEB CED 54∠∠==，()BAE ABE ECD CDE 218054252∠∠∠∠∴+++=-=， ()()111M N BAE DCE ABE CDE 252126222∠∠∠∠∠∠∴+=+++=⨯= ．。
选择题限时训练一(答案)
第1页高三物理限时规范选择题（一）姓名成绩1、如图所示，甲、乙、丙、丁是以时间为轴的匀变速直线运动的图象，下列说法正确的是（C）A．甲是a—t图象B．乙是s－t图象C．丙是s－t图象D．丁是v—t图象2、客车运能是指一辆客车单位时间最多能够运送的人数。
其景区客运索道的客车容量为50人/车，它从起始站运行至终点站单程用时10分钟。
该客车运行的平均速度和每小时的运能约为(A)A．5m/s，300人B．5m/s，600人C．3m/s，600人 D．3m/s，300人3、2006年我国自行研制的“袅龙”战机04架在四川某地试飞成功。
假设该战机起飞前从静止开始做匀加速直线运动，达到起飞速度v所需时间为t，则起飞前的运动距离为(B)A．vt B．C．2vt D．不能确定4、若以固定点为起点画出若干矢量，分别代表质点在不同时刻的速度，则这些矢量的末端所形成的轨迹被定义为“速矢端迹”。
由此可知(BC)A、匀速直线运动的速矢端迹是线段B、匀加速直线运动的速矢端迹是射线C、匀速圆周运动的速矢端迹是圆D、简谐运动的速矢端迹是点5、木块A、B分别重50 N和60 N，它们与水平地面之间的动摩擦因数均为0.25；夹在A、B之间轻弹簧被压缩了2cm，弹簧的劲度系数为400N/m。
系统置于水平地面上静止不动。
现用F=1 N的水平拉力作用在木块B上。
如图所示.。
力F作用后(C)A.木块A所受摩擦力大小是12.5 NB.木块A所受摩擦力大小是11.5 NC.木块B所受摩擦力大小是9 ND.木块B所受摩擦力大小是7 N6、如图所示，质量不计的定滑轮以轻绳牵挂在B点，另一条轻绳一端系重物C，绕过滑轮后，另一端固定在墙上A点。
若改变B点位置使滑轮位置发生移动，但使AO段绳子始终保持水平，则可以判断悬点B所受拉力T的大小变化情况是 (C)A．若B左移，T将增大B．若B右移，T将增大C．无论B左移、右移，T都保持不变D．无论B左移、右移，T都减小7、物体A的质量为lkg，置于水平地面上，物体与地面的动摩擦因数为μ = 0.2．从t= 0开始物体以一定初速度υ向右滑行的同时，受到一个水平向左的恒力F = 1N的作用，则能反映物体受到的摩擦力F f随时间变化的图像是下图中的哪一个?(取向右为正方g=10m/s2) (A)8、如图所示，用轻绳吊一个重为G的小球，欲施一力F使小球在图示位置平衡(θ<30°)，下列说法正确的是： (ABD)A．力F最小值为θsin⋅GB．若力F与绳拉力大小相等，力F方向与竖直方向必成θ角．C．若力F与G大小相等，力F方向与竖直方向必成θ角．D．若力F与G大小相等，力F方向与竖直方向可成2θ角．9、如图，位于水平桌面上的物块P，由跨过定滑轮的轻绳与物块相连，从滑轮到P和到Q的两段绳都是水平的，已知Q与P之间以及桌面之间的动摩擦因数都μ，两物块的质量都是m，滑轮轴上的摩擦不计，若用一水平向右的力F拉P使P做匀速运动，则F的大小为(A)A．4μmg B．3μmgC．2μmg D．μmg10、质量为m的小球于三根相同的轻质弹簧相连，静止时相邻弹簧间的夹角为120︒，如图所示，已知弹簧a、b对小球的作用力均为F，则弹簧C对小球的作用力可能为 (ABCD)A．F B．F + mgC．F – mg D．mg – F。
限时综合训练(一)
解析
A项均为介词，表被动。
B项连词，表承接，于是，就/副词，表肯定，就是。 C项连词，表转折/后者为连词，表递进。 D项和“为”字配合使用，表被动/用在动词之前，构成名词性词组。
解析答案
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3.下列对原文有关内容的概括与赏析，不正确的一项是( 知州，但很快又被提拔，担任三司度支判官。
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李氏居京城北崇庆里，凡七世不异爨，至昭述稍自丰殖，为族人所 望，然家法亦不隳。 注 噍类：活着的人或活的动物。 (选自《宋史· 列传第二十四》，有删改)
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1.对下列句子中加颜色词语的解释，不正确的一项是( B )(3分)
A.其谋遂寝 寝：停止
B.向非公，无噍类矣
民者凡数千顷，昭述悉复之。以太常博士知开封县，特迁尚
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徙湖南潭州，戍卒愤监军酷暴，欲构乱，或指昭述谓曰：“如李公长
者，何可负？”其谋遂寝。昭述闻之，以戒监军，监军自是不复为暴。比
去，众遮道罗拜，指妻子曰：“向非公，无噍类[注]矣。”
徙淮南转运使兼发运使，加直史馆。徙陕西转运使，纠察在京刑狱，
以万超为行营壕砦使。河中平，拜怀州刺史。
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周祖开国从征慕容彦超又为都壕砦使以功授洺州团练使预收秦凤改
莱州从平淮南连移蕲登二州所至有善政。属有诏重均田租，前牟平令马
英语限时训练一,二有答案
英语限时训练一,二有答案英语限时训练一姓名_______ 学号________ 分数_________第二部分：词汇知识运用（共两节，满分40分）( 用时不超过20分钟)第一节：多项选择（共10小题；每小题1分，满分10分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21.My Dad did not the idea that I would go camping with my friends this weekend.He said it was dangerous for girls to live outside.A. depend onB. approve ofC. leave outD. give up22. After the meeting was over, the secretary _____ the new workers to the master’s office.A. aimedB. pointedC. guidedD. imitated23. I was grateful to Anna for being open and giving me the opportunity to explain and ______ the misunderstanding between us.A. handleB. clarifyC. raiseD. develop24.—Hi, I hear you’re going to London this summervacation.—, I was going to, but now I have changed my plan.A. PreviouslyB. RecentlyC. AbsolutelyD. Partly25. At the end of the year 2010, some species of birds didn’t survive the _____ winter in some European countries.A. severeB. seriousC. mildD. extreme26. The only drawback of the voyage was the ______ sea, which made me very seasick.A. calmB. roughC. patientD. tough27.We need to spend more time researching these suggestions so that we can make a(n) choice.A. knownB. talentedC. advise dD. informed28.The sentence doesn’t make any , no matter how you read it.A. contributionB. roomC. senseD. use29. The term paper was due to December 1, but hard as he tried, he was unable to meet the _____ for it.A. challengeB. needC. deadlineD. date30. I like to put everything so that I can find it easily.A. in timeB. in placeC. in allD. in general第二节：完型填空（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
限时训练的概念
限时训练的概念限时训练是指在一定时间内进行系统性、高强度的训练，以达到快速提升技能水平或达到一定目标的训练方法。
它的概念可以应用于各个领域，包括体育运动、学术研究、职业培训等。
在限时训练中，时间起到了一个重要的作用，既是一种压力源，也是一种提高效率的手段。
通过限时训练，可以有效地激发个体潜能，加强对自身能力的认识，并提高工作效率和个人能力。
限时训练的优势之一是提高效率。
在有限的时间内，个体需要集中注意力和精力，抓住关键点，以快速完成任务。
相对于没有时间限制的训练，限时训练可以有效地避免拖延症的产生，强迫个体专注于任务。
通过高强度的训练，个体在有限时间内集中精力，可以在短时间内快速提升技能水平，达到预定目标。
例如，在运动训练中，运动员经常进行限时训练，通过竞技比赛、训练赛等方式，限制比赛时间，强迫运动员在短时间内全力以赴，加快提高技能和战术水平的进程。
限时训练还有助于个体的挑战与成长。
在有限的时间内，个体需要面对更多的压力和困难，同时也有更多的机会去尝试和实践。
这种挑战能激发个体内在的潜能，推动个体克服困难，不断突破自己的极限。
在体育运动中，比赛常常有时间限制，运动员必须在规定时间内尽快完成比赛任务，这要求运动员在有限时间内高效运动、制定战术，并展示自身的技能和能力。
正是因为时间限制的存在，运动员能够更好地调整心态，学会应对压力和逆境。
此外，限时训练还有助于个体的自律和时间管理能力的培养。
限时训练要求个体合理分配时间，设定目标，制定计划，并严格按照计划执行。
个体需要通过时间管理，将有限的时间合理安排，使每一个环节都能得到充分利用。
同时，限时训练还能让个体养成良好的时间意识，提高个体对时间的敏感度和把控能力，使个体能够更好地制定目标、规划未来，并有效管理时间，提高工作效率。
然而，限时训练也存在一些挑战和不足之处。
首先，有限的时间会带来更大的压力和紧迫感，对一些个体来说，压力过大可能导致焦虑等负面情绪的产生，从而影响个体的学习和表现。
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限时训练一（建议用时25分钟，正确率：，）阅读下面短文，从短文后各题所给的A、B、C 和D四个选项中，选出可以填入空白处的最佳选项，并在答题纸上将该项涂黑。
I had a student today who got his finger stuck inside a test tube in science class. It was really quite stuck. This young man’s finger 36 to get whiter and whiter right before my eyes.Remaining 37 , I suggested he carefully rotate （转动）the tube. It wouldn’t move a bit. He 38 soap and cold water. Still stuck. Meanwhile 39 was breaking out in the class. Finally, I 40 the young man to our secretary, who was a miracle （奇迹）worker 41 three kids of her own. With her in charge, I was 42 all would be OK.To get the students back in order, I 43 my own story of getting my 44 stuck between the rails of a balcony. Same kind of curiosity, I remembered 45 then how far I could thrust （塞）my knee between the rails. Inch by inch, I kept 46 and before I knew it, my knee was stuck and 47 before my eyes and in front of lots of 48 at a popular Las Vegas hotel!Hearing my story, many students followed with their own49 of heads, arms, fingers stuck in places they shouldn’t50 .A few minutes later, the young man came back, test tube unbroken and finger 51 to lovely shade of pink.I just couldn’t52 this kid. He’s only twelve. I too got my knee unstuck, but not without great 53 . The excuse for me, however, was not 54 but plain stupidity. I was 55 fifty years old when this happened.36. A. used B. needed C. happened D. continued37. A. calm B. silent C. cheerful D. active38. A. lost B. fetched C. tried D. accepted39. A. fire B. chaos C. violence D. argument40. A. described B. carried C. introduced D. sent41. A. raising B. observing C. saving D. teaching42. A. happy B. doubtful C. surprised D. confident43. A. shared B. wrote C. read D. heard44. A. head B. knee C. arm D. foot45. A. calculating B. explaining C. wondering D. reporting46. A. pushing B. climbing C. walking D. kicking47. A. shaking B. lifting C. resting D. swelling48. A. doctors B. strangers C. managers D. students49. A. findings B. conclusions C. stories D. news50. A. be B. exist C. stay D. stop51. A. pointing B. returning C. belonging D. growing52. A. get along with B. get rid of C. get used to D. get mad at53.A.encouragement B.disappointment C.embarrassmentD. achievement54. A. ambition B. youth C. bravery D. experiment55. A. in the end B. in total C. after all D. at any rateMy First Marathon（马拉松）A month before my first marathon，one of my ankles was injured and this meant not running for two weeks，leaving me only two weeks to train．Yet，I was determined to go ahead．I remember back to my 7th year in school．In my first P．E．class，the teacher required us to run laps and then hit a softball．I didn't do either well．He later informed me that I was" not athletic"．The idea that I was "not athletic" stuck with me for years．When I started running in my 30s，I realized running was a battle against myself，not about competition or whether or not I was athletic．It was all about the battle against my own body and mind．A test of wills!The night before my marathon，I dreamt that I couldn't even find the finish line．I woke up sweating and nervous，but ready to prove something to myself．Shortly after crossing the start line，my shoe laces （鞋带）became untied．So I stopped to readjust．Not the start I wanted！At mile 3，I passed a sign：" GO FOR IT，RUNNERS!"By mile 17，I became out of breath and the once injured ankle hurt badly．Despite the pain，I stayed the course walking a bit and then running again．By mile 21，I was starving！As I approached mile 23，I could see my wife waving a sign．She is my biggest fan．She never minded the alarm clock sounding at 4 a．m．or questioned my expenses on running．I was one of the final runners to finish．But I finished! And I got a medal．In fact，I got the same medal as the one that the guy who came in first place had．Determined to be myself，move forward，free of shame and worldly labels（世俗标签），I can now call myself a "marathon winner"．（1）A month before the marathon，the author．A．was well trained B．felt scaredC．made up his mind to run D．lost hope（2）Why did the author mention the P．E．class in his 7th year？A．To acknowledge the support of his teacher．B．To amuse the readers with a funny story．C．To show he was not talented in sports．D．To share a precious memory．（3）How was the author's first marathon？A．He made it．B．He quit halfway．C．He got the first prize D．He walked to the end．（4）What does the story mainly tell us？A．A man owes his success to his family support．B．A winner is one with a great effort of will．C．Failure is the mother of success．D．One is never too old to learn．。