限时训练参考答案

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九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）一．根据句意及首字母和汉语提示完成句子。

1.The official newspaper c_________the news of Tiangong-I,for it took a big step forward into space.2.The idiom(成语）:“Meng zi’s mother makes three moves”tells of a mother who did all she could to provide the best e_________for her child.3.The young lady w _______hair is blond comes from Australia.4.Sometimes, you won’t know the true value of a moment u_______it becomes a memory.5.Good _______(发音）will impress others and make yourself confident.二．完形填空（共10小题；每小题1分，满分10分）There was a garden full of plants. In the corner of the garden, a 6 rose grew. She was the most beautiful flower there. She was as white as snow, 7 the plants around her were shocked at her beauty. But the white rose couldn’t see 8 , so she didn’t know how beautiful she was.Sometimes, she was even a little envious (羡慕的) of the sunflowers around her. She hoped that she could be as 9 as them.One sunny day, a girl went into the 10 . She walked around and was amazed at the beauty of na ture. Suddenly, she saw the white rose. “It hasn’t rained for days,” said the girl. “And the weather report says it will continue to be 11 for a few days. If the rose stays here, it will 12 soon. I’ll take it home and put it in my beautiful vase(花瓶).”The white rose was put in a lovely vase by the window. From the reflection in the window, the white rose saw herself for the 13 time. “Is that me?” she was shocked. “Till now I didn’t 14 how beautiful I looked.”Sometimes, we think other people are very great and 15 know our own advantages. This makes us feel less confident of ourselves. Look into your heart, and you’ll find how great you are.6. A. white B. red C. blue7. A. or B. but C. and8. A. herself B. himself C. yourself9. A. quiet B. lovely C. lonely10. A. park B. corner C. garden11. A. rainy B. cloudy C. sunny12. A. leave B. die C. cancel13. A. first B. second C. third14. A. improve B. realize C. suppose15. A. always B. usually C. never三．综合填空（共10小题；每小题2分，满分20分）根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。

九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）（满分28分时间25分钟）一、还原型阅读（共5小题；每小题2分，满分10分）二、阅读理解（共4小题；每小题2分，满分8分）In 1987 a small company named Huawei was started in Shenzhen.After more than 30 years of development, the company has now beaten Apple and become the world's second largest maker of smartphones. It has also become the world's supplier(供应者)of 5G.In China and even in the world.Huawei is a wonder. Although it started producing mobile phones not many years ago,it has become one of the most famous phone companies.But recently,Huawei faces some difficulties. The US government made a law to stop its sales in America. American officials said Huawei gave information that it collected to the Chinese government. At the same time, the US government planned to stop selling parts and services to Huawei. They believed that Huawei's business would be hurt this way.“We have never received such a request from the Chinese government and we have never tried to get into other systems to collect information," Ren Zhengfei, Huawei's president said. "The law would have little effect on our company. Huawei has enough ability to deal with the problems," Ren added.In an interview several years ago,Ren Zhengfei said,“I started Huawei with only £4000 at the beginning,but now it has become a 100 billion company. The experience was not as romantic as you imagine.Facing the law of the US,Huawei is growing. Huawei's smartphone sales around the world rose 50 percent compared with a year earlier in the first three months of2019. At the same time,sales from both Samsung and Apple fell. So far Huawei has grown into the world's largest telecommunication equipment supplier(供应商), selling in 170 countries. It may beat Samsung as the largest smartphone maker in the near future.6. How many kinds of smartphones are mentioned in total in this passage?A. One.B. Two.C. Three.D. Four.7. Which of the following sentences is TRUE according to the passage?A. Huawei collected the information for the Chinese government.B. Ren Zhengfei started Huawei with only L4000 in1987.C. Huawei has beaten Samsung.a South-Korea phone maker so far.D. Huawei has developed its business smoothly.8. What does the underlined word "romantic”in Paragraph 4 mean in Chinese?A.浪漫的B.现实的C.成功的D.麻烦的9. The last paragraph mainly tells us.A. Huawei has become one of the most famous phone companies.B. Huawei has become the largest maker of smart phones in the world.C. Huawei has got into some systems of the US.D. Huawei is full of hope and must succeed in the future .三、阅读表达（共5小题，每小题2分，满分10分）阅读下面的短文，并根据短文后的要求答题。

九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）（满分40分，时间30分钟）一.单词拼写（共5小题，每题2分，满分10分）根据句意和首字母或汉语提示，将单词的正确形式完整地写在横线上。

1. —Cindy, what kind of restaurants do you like ?—I p_____ restaurants that can provide customers with free Wi - Fi.2. Mr.King is very P ______. He often explains difficult problems many times until we understand.3. It’s_________（危险的）for people to use the mobile phone while crossing the street.4. China has been making many great _____（成就）in every field these years, which amazes the world.5. Teenagers should be_________（鼓励）to learn and spread Chinese traditional culture.二、综合填空（共10小题，每题2分，满分20分）根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。

（每词限用一次）hour, power, a, matter, pain, compete, good, point, keep, createEileen Gu was born in San Francisco, California to an American father and a Chinese mother. While 6._______ for the United States in her earlier years, Gu announced her decision to ski for China in 2019 after her first World Cup Italy. In the interview, Gu mentioned her 8.5 7.______training a day, which gives her the confidence to win.She scored 1,580 8. ________out of a maximum 1,600 in the SAT, the test used for college admissions in the United States. “I encourage you all to step out of your comfort zone to show the boys that girls are just as 9._________ as they are.” Gu said. “I’m not trying 10._________ anyone happy. I’m 11.________18-year-old girl living my best life. It doesn’t really12. _____ if other people are happy or not, because I feel I am doing my 13._______. I’m enjoying the entire process and I’m using my voice 14._______ as much positive change as I can, fo r the voice that will listen to me.”She’s not afraid of hardship, tiredness, and 15.______ .she’s especially positive and optimistic. she’s quite burning. A ball of flame was surrounding her.三、阅读理解（共5个小题，每题2分，满分10分）阅读下面的短文，从每题所给的A、B、C、D四个选项中，选出最佳答案。

辽宁省沈阳市2024-2025学年八年级上学期限时训练(月考)语文试卷(含答案)

2024年沈阳市八年级阶段性练习语文学科时间90分钟分数120分请将所有试题答案写在答题卡上．．．．．．．．．．．．．．一、积累与运用（23分）1.下列各组词语中，加点字的字音，字形完全正确的一组是( )（3分）A. 凛洌．（liè）要塞．（sāi）轻盈（yíng）锐不可当．（dāng）B．颁．发（bān）仲．裁（zhòng）履．行（lǚ）屏息敛．声（liǎn）C．悄．然（qiāo）翘．首（qiáo）椹．蓝（zhàn）摧枯拉朽．（xiǔ）D. 凌．波（lín）隽．刻（juān）督．战（dū）一丝不苟．（gǒu）2.依次填入下面句子横线处的词语最恰当的是( )（3分）语言的力量，贵在言之有德。

同样一句话，不同的人讲往往会产生不一样的效果。

纵观历史长河，誓言“舍身为国”、发出惊人之语者不在少数，他们终能______，为民族精神______生动元素。

反观那些“两面人”、投机者，纵然______、巧舌如簧，由于没有人格的光亮、缺少修养的______，说出来的话自然无法令人信服。

A．流芳千古投入言之凿凿支持B．流芳千古注入信誓旦旦支撑C．浩气凛然注入信誓旦旦支持D．浩气凛然投入言之凿凿支撑3.下列各项中分析有误．．的一项是( )（3分）山吹，是一种颜色，纯正的黄。

这么奇怪，用这样一个词，来表述一种色彩。

此间的称谓，显然是雅的，雅得脱俗．．“山吹”这两个字时，要口气清新．．．．。

这份．．．．，甚至说出雅致，与众不同．．．一片金黄。

曾想，我______有一只．．．．。

风，吹着吹着，就．黄了，而且是清代山吹色云龙纹盘，平日里______会挑一些颜色可与它搭配之物，比如，在盘中摆放娇嫩无比、色泽鲜红的草莓或樱桃，黃与红的搭配，是绝配，让人看一眼，就因美好的景象而心情舒畅，心情也会不知不觉跟着快慰许多。

A.“雅得脱俗““说出”“口气清新”“与众不同”都是补充短语。

高三数学限时训练以及参考答案

高三数学限时训练（十九）一．填空题（本大题共14小题，每题5分，满分70分）1．已知集合2112{|lg 0},{|222,}x M x x N x x Z -+===<<∈,则M N = ．2．已知等差数列{a n },其中,33,4,31521==+=n a a a a 则n 的值为 _ ．3．已知函数log ()a y xb 的图象如右图所示,则b a = _4．设函数lg |2|,2()1,2x x f x x -≠⎧=⎨=⎩，若关于x 的方程0)()(2=++c x bf x f 恰有5个不同的实数解x 1、x 2、x 3、x 4、x 5则f(x 1＋x 2＋x 3＋x 4＋x 5)＝． 5．直线Ax ＋By ＋C ＝0与圆x 2＋y 2＝4相交于两点M 、N ，若满足C 2＝A 2＋B 2，则OM ·ON （O 为坐标原点）＝ _ ．6．设椭圆的两个焦点分别为F 1、、F 2，过F 2作椭圆长轴的垂线交椭圆于点P ，若△F 1PF 2为等腰直角三角形，则椭圆的离心率是．7．已知α,β均为锐角,且21sin sin -=-βα,1cos cos 3αβ-=,则cos()αβ-= _ ．8．已知变量x 、y 满足条件6200x y x y x y +≤⎧⎪-≤⎪⎨≥⎪⎪≥⎩，若目标函数z ax y =+ (其中0a >)，仅在(4，2)处取得最大值，则a 的取值范围是．9．在△ABC 中,若a ＝7,b ＝8,13cos 14C =,则最大内角的余弦值为．10．一个几何体的三视图中，正视图和侧视图都是矩形，俯视图是等腰直角三角形（如图），根据图中标注的长度，可以计算出该几何体的表面积是．第10题11．已知双曲线2212y x -=的焦点为F 1、F 2，点M 在双曲线上且120,MF MF ⋅=则点M 到x 轴的距离为．12．设()y f x =是定义在R 上的函数，给定下列三个条件：①()y f x =是偶函数；②()y f x =的图象关于直线1x =对称；③2T =为()y f x =的一个周期．如果将上面①、②、③中的任意两个作为条件，余下一个作为结论，那么构成的三个命题中真命题的个数有个．13．在△ABC 中,1=BC ,2=AB ,1cos 4B =，则sin(2)A B +的值为．14．对于函数⎩⎨⎧>≤=.cos sin ,cos ;cos sin ,sin )(x x x x x x x f 给出下列四个命题：①该函数是以π为最小正周期的周期函数；②当且仅当x k ππ=+()k Z ∈时，该函数取得最小值－1； ③该函数的图象关于ππk x 245+=()k Z ∈对称； ④当且仅当πππk x k 222+<<()k Z ∈时，.22)(0≤<x f 其中正确合题的序号是（请将所有正确命题的序号都．填上）．二．解答题（本大题有2个题，每小题15分，共30分） 15．（本大题满分15分）已知△ABC 的面积S 满足3≤S ≤33且BC AB BC AB 与,6=⋅的夹角为α．（Ⅰ）求α的取值范围；（Ⅱ）求ααααα22cos 3cos sin 2sin )(++=f 的最小值．16．（本大题满分15分）如图，在平面直角坐标系xOy中，平行于x轴且过点A(33，2)的入射光线l1被直线l：y=33x反射．反射光线l2交y轴于B点，圆C过点A且与l1, l2都相切．（1）求l2所在直线的方程和圆C的方程；（2）设P，Q分别是直线l和圆C上的动点，求PB+PQ的最小值及此时点P的坐标．限时训练（十九）答案一．填空题1．{}1- 2．50 3．27 4．3lg2 5．-2 61 7．59728．a>19．71-10．12+42 11 12．3 13．16153 14．③④二．解答题15．解：（Ⅰ）由题意知6cos ||||=⋅=⋅αBC AB BC ABαcos 6||||=⋅BC AB αααααπtan 3sin cos 621sin ||||21)sin(||||21=⨯⨯=⋅=-⋅=BC AB BC AB S 333≤≤S3tan 133tan 33≤≤≤≤∴αα即BC AB 与是α 的夹角 ],0[πα∈∴]3,4[ππα∈∴．（Ⅱ）=++=++=ααααααα222cos 22sin 1cos 2cos sin 2sin )(f)42(222cos 2sin 22πααα++=++]3,4[ππα∈)(3121142απαππαf 时即当当==+∴有最小值为233+． 16．解：（1）直线1l ：y=2，设1l 交l 于点D ，则D （23，2） ∵l 的倾斜角为30° ∴2l 倾斜角为60°∴32=k ∴反射光线2l 所在的直线方程为y —2=)32(3-x 即043=--y x已知圆C 与1l 切于点A ，设C （a ，b ） ∵圆心C 在过点D 且与l 垂直的直线上 ∴83+-=a b ……① 又圆心在过A 且与1l 垂直的直线上 ∴33=a ……② 由①②得 33=a 1-=b 圆C 的半径r=3故所求圆的方程为9)1()33(22=++-y x ．（2）设点B （0，—4）关于l 的对称点B ＇（00,y x ）则2332400x y ⋅=-，且340-=+x y ∴B ＇（—23，2）固定点Q 可发现，当B ＇、P 、Q 共线时，PB+PQ 最小故PB+PQ 的最小值为B ＇C —3∴PB+PQ 的最小值B ＇C —3=221—3．。

九年级语文限时训练及答案

九年级语文周测11月23日姓名分数一、基础·运用“自强不息”是中华民族生生不息的力量源泉。

某校初三年级开展以“君子自强不息”为主题的综合实践活动，诚挚邀请你参与到活动中来!【追本溯源明“自强”】“天行健，君子以自强不息。

”这是《易传》开篇中的一句话，讲的是天道刚健，周而复始，永无止息，启示人们应效法天道，自强不息。

自强不息，首先强调的是刚健有为，积极进取。

孔子曰：“三军可夺帅也，匹夫不可夺志也。

”他为了自己的人生追求，“学而不厌，诲人不倦”“【甲】”，成为坚忍刚毅、奋斗不止精神的典范。

图强求变、创新超越也是自强不息精神应有之义。

“刚健笃实，辉光日新”“【乙】”，这些(zhēn)言都体现出古人对创新的追求，而中华民族发展史上的一个个发明创造、一次次革故鼎新，则是自强不息精神在创新实践中结出的累累硕果。

自强不息的精神还表现为无私忘我的人生境界。

古代文人恪．守孔孟之道，将“君子以自强不息”的内涵诠释得生动而透彻。

尽管仕途多舛，他们也依旧高洁自守不同流合污；虽然身遭贬谪，他们却依然高声吟唱“【丙】”；即使身居偏远的江湖，他们也要尽其所能造福一方百姓。

1.文段中画横线字的笔顺、根据拼音写的汉字、加点字的读音，全都正确的一项是( )A. “匹”的第二笔为“”箴言kèB. “匹”的第二笔为“”箴言kèC. “匹”的第二笔为“”真言gèD. “匹”的第二笔为“”真言gè2.小明要向同学们解释“自强不息”的意思，他从字典中查阅了“息”的词义。

下面是其中的三个解释：①呼吸时进出的气：②停止；③休息。

请你帮助他解释“自强不息”的意思。

(限15字以内)答：3.将下面三句话分别填入文中【甲】【乙】【丙】处，正确的一项是（）①苟日新，日日新，又日新②发愤忘食，乐以忘忧，不知老之将至③欲为圣明除弊事，肯将衰朽惜残年A.③②①B.①③②C.③①②D.②①③4.根据语境，下列选项中不属于“他们”行列的一项是（）A.张岱B.范仲淹C.苏轼D.欧阳修【树立榜样学“自强”】三代北斗人始终把党的事业作为最大事业，把国家利益作为最高利益，把民族梦想作为最终梦想，用“献了青春献终身，献了终身献子孙”的家国情怀书写了中国北斗光耀全球的不朽传奇。

限时训练9答案

s1 =
qu0 2T qu0 2T ⋅ ⋅ + 2dm 3 dm 3
2
2 T qu0 T 7 qu0T ⋅ − ⋅ = 18dm 3 2dm 3
2
当粒子由 t = nT +
2T 时刻进入电场，向上侧移最大，则 3
2
qu0 T qu0T 2 s2 = ⋅ = 2dm 3 18dm
U 0 qT 2 U 0 qT 2 ) +( ) = 3dm 3dm vy = 1 ⇒ θ = 45 ° v0
2U 0 qT 3dm
设速度方向与 v0 的夹角为 θ，则
tan θ =
（3）要使平行粒子能够交于圆形磁场区域边界且有最小区域时，磁场直径最小值与粒子宽度相等粒子宽度
D= D = 2
4qU 0T 2 2 2qU 0T 2 cos 45o = 9md 9dm
答题卡
题号答案 1 ABD 2 B 3 C 4 AD 5 B 6 BD 7 BCD 8 ABD 9 C 10 D
11． 1） a = g sin θ − µg cos θ ．）（
（2） E = ）
2mgd (r + R) gR tan θ
12．（3）若要使打出电场的粒子经某一垂直纸面的圆形区域匀强磁场偏转后，都能通过圆．形磁场边界的一个点处，而便于再收集，则磁场区域的最小半径和相应的磁感强度是多大？：（1）当粒子由 t = nT 时刻进入电场，向下侧移最大，则
故磁场区域的最小半径为
r=
2qU 0T 2 粒子在磁场中作圆周运动有 9dm
1
qvB = m
v2 r
解得 B =
3m qT

九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）（满分55分时间40分钟）一、听短文填表格。

根据短文内容,写出下面表格中所缺信息,每空一词。

短文造三遍。

你将有20 秒钟的时二、单词拼写1.Mother’s cooking skills will not only satisfy our _______(胃)，but also our spirit.2. That book is well w_______ reading. You'd better read it.3. Many parents are _______(考虑)sending their children to study abroad.4.I am c_______ wrong for sure.I have to do the research from the very beginning.5.A bicycle is far more c_______ than a car in busy cities.6. Birds are the natural e_______ of many insect pests(害虫).7. I p______ modern novels to classical novels two years ago, but now l like the four Chinese classic novels very much.8. Everyone knows the secret e______Tom. Nobody wants to tell him about it.9. Listening to music is a way of______(放松)yourself.10. These _______(艺术家)design won an international award.三．写作(共1题,满分25分)国家在今年新年贺词(New Year speech)中重申了“奋斗(strive)”这一时代主题词,强“征途漫漫,惟有奋斗(The road ahead is long, and striving is the only way forward.)”,激励令人民奋力开拓新时代,同心共筑中国梦。

限时训练参考答案

限时训练参考答案限时训练参考答案在现代社会中，时间成为了一种宝贵的资源。

我们总是不断地追求高效率和快速完成任务的能力。

为了应对这种需求，限时训练应运而生。

限时训练是一种通过在规定的时间内完成任务来提高工作效率和学习能力的方法。

在这篇文章中，我们将探讨限时训练的意义和一些参考答案。

限时训练的意义在于它可以帮助我们培养时间管理和压力应对能力。

在限时训练中，我们必须在规定的时间内完成任务，这迫使我们学会合理安排时间和高效利用时间。

这种训练不仅可以提高我们的工作效率，还可以培养我们的冷静和应对压力的能力。

当我们在紧迫的时间限制下工作时，我们需要保持冷静并集中注意力，这对我们的工作和学习都非常重要。

在进行限时训练时，我们需要有一些参考答案来帮助我们评估自己的表现。

这些参考答案可以是标准答案、模板或者是其他人的答案。

通过参考答案，我们可以了解到自己在时间管理、任务完成和问题解决等方面的表现如何。

同时，参考答案也可以帮助我们发现自己的不足之处，并进行针对性的改进。

然而，我们需要明确的是，参考答案只是一种参考，我们并不需要完全照搬，而是应该根据自己的实际情况进行调整和改进。

在限时训练中，我们可以运用参考答案的方法和思路，但是我们需要注意避免机械地套用答案。

每个人都有自己的思维方式和解决问题的方法，因此我们需要根据自己的特点和优势来进行答题。

参考答案只是给我们提供一种思路和方法的参考，而不是唯一的正确答案。

我们需要根据自己的理解和思考来进行创新和发展。

限时训练不仅可以应用于学习和工作，也可以应用于日常生活中的各个方面。

比如，我们可以设定一个时间限制来完成家务，这样不仅可以提高效率，还可以让我们有更多的时间去做其他喜欢的事情。

又比如，我们可以设定一个时间限制来锻炼身体，这样不仅可以提高身体素质，还可以节约时间。

限时训练可以应用于各个领域，它可以帮助我们更好地管理时间，提高效率。

综上所述，限时训练是一种提高工作效率和学习能力的方法。

九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）（满分45分时间25分钟）一、听力（共10小题；每小题1分，满分10分）（一）录音中有五个句子，每个句子听一遍，然后从每小题A、B、C中选出适合每个句子的答语。

（5分）1. A. Qingdao. B. Xi'an. C. Kunming.2. A. At 6:00 p. m. B. At 11:00 p. m. C. At 6:00 a. m.3. A. At home. B. A dictionary. C. When he was ten.4. A. Sorry, I don't. B. Certainly, I could. C. OK, here you are.5. A. Don't do it. B. Me neither. C. Good idea.（二）在录音中你将听到一段短文及五个问题。

根据短文内容及问题选择正确答案。

短文及问题听两遍。

（5分）6.A. 13 years old. B. 14 years old. C. 15 years old.7. A. She likes reading and running.B. She likes painting and jogging.C. She likes dancing and singing.8. A. She thinks it is interesting. B. She thinks it is difficult. C. She thinks it is easy.9. A. She is a math teacher. B. She is a policewoman. C. She is a doctor for children.10. A. Jane works hard at math.B. Jane's aunt asked her to do more exercises.C. Jane got the right answer of the math problem.二、完形填空（共10小题；每小题1分，满分10分）阅读下面短文，掌握其大意，然后从每题所给的A、B、C三个选项中，选出能填入短文相应空白处的最佳选项，并在答题卡上将该项涂黑。

限时组合训练30套答案

一、答案 :1-5 GBADF二、1.have disappeared结合时间状语可以看出disappear这个动作已经完成,故使用现在完成时态。

2.The most famous 此处暗含最高级,意为“在这些动物之中最有名的是……”。

3.tens tens of millions同tens of thousands 都是固定用法。

4.before 此处是指恐龙比人类诞生早很久。

5.to find be surprised to do sth.意为“做某事感到吃惊”。

6.like 此处like为介词,表示“像……一样”。

7.were joined the way为先行词,省略了where或in which,此句话中主语为the bones,复数,与join的关系为被动。

8.out die out 为固定搭配,意为“灭绝”。

9.too 此处为too...to...结构,表示“太……而不能……”10.have died 从句中的recently可以看出此处用现在完成时。

三、One day last month,a group of Chinese arrived in Brisbane.I was one of them.After goodbye to my dear parents at Beijing Airport,I started my long journey.That was my first journey abroad!How I feltwhen I got on board.We left Shanghai Hong Kong to change to another plane to Melbourne, second largest city in Australia.From there we flew to Brisbane, is the capital city of Queensland,Australia.We were exchange students and to the country by government to learn English in Brisbane for twelve months. From the firstfew lessons, We found the teachers there really worked , and I am sure of everything will go well in the next months.一、答案 :1-5DGACF二、1.1960s 1960s是一种年代的表达方式,意为“20世纪60年代”。

2023届高三英语晚自习限时训练(含答案)

2023届高三英语晚自习限时训练一、阅读理解AParis is the most wooded city in Europe, and around one quarter of its area is taken up by parks, gardens and other green spaces.Jardin des Plantes: over 28 hectaresThis impressive botanical garden is home to four museums, including the Natural History Museum, which houses a variety of African animals. The gardens themselves boast thousands of species of plants. This is a lovely place to relax and explore the beautiful surroundings.Parc des Buttes-Chaumont: over 24 hectaresIf you want to get off the tourist trail and hang out with true Parisians, this park is the perfect spot for a relaxing picnic or a leisurely wander. It is in the 19th district and is one of the largest parks in Paris. Cross its lake on the suspension bridge, or admire the waterfalls and attractive temples.Jardin du Luxembourg: over 25 hectaresThese beautiful gardens were first laid out in 1612 as the gardens of the Luxembourg Palace. They include a geometric forest, French and English style gardens, as well as a large pond. There is so much to see and do with activities especially for children, such as slides, rides and puppet shows, as well as leisure and sporting activities for adults. The gardens are home to more than one hundred sculptures.Le Parc de la Villette: 55 hectaresThis urban cultural park is so much more than just a park as it is home to numerous music venues, exhibition spaces and cafes. It is also home to no less than 12 gardens, which all follow different themes. The Passenger Gardens, for example, which are built on what was once the sheep market, support a variety of ecosystems, demonstrating the importance of biodiversity.1. Which green space probably suits students who are interested in botany?A．Jardin des Plantes. B．Parc des Buttes-Chaumont.C．Jardin du Luxembourg. D．Le Parc de la Villette.2. Which is special about Jardin du Luxembourg?A．They used to be royal gardens. B．They are Parisian favourite gardens. C．They feature American style gardens. D．They house a variely of African animals.3. What can visitors do in Le Parc de la Villette?A．Visiting museums. B．Attending concerts.C．Admiring waterfalls. D．Watching puppet shows.BA team of researchers at ETH Zurich has the perfect long-lasting solution to our fog problem. They have developed a very thin and gold-based transparent coating (涂层) that can convert sunlight into heat, which can be applied to glass and other surfaces to prevent them from fogging.The special coating is developed using titanium oxide and gold particles. It selectively absorbs infrared radiations (红外线照射) from the sunlight and creates a heating effect that is powerful enough to keep fog away from the surface of an object.The coating basically employs heat to stop fogging. The coating absorbs a large part of the infrared radiation, which causes it to heat up-by up to 8℃.Previously, products like anti-fogging sprays create a very thin film of water on the surface to remove fog. The problem with such surfaces is pollution. Along with water, the sprays also attract dirt, dust, oil, and various other dirty substances, and just a little dirt on the surface makes it useless. However, the new coating repels (排斥) water. Furthermore, the coating is significantly thinner, which makes it more transparent as well as flexible. It is heated passively and requires, during daytime, no additional energy source.Gold might be expensive, but the researchers stress that their coating requires solittle that the material costs remain low. Their coating is produced with standardized and readily scalable methods, all cost-effectively. However, although this product can work at very low levels of solar irradiation, it does rely on a certain amount of light.The researchers will develop the coating further for other applications. In the process, they will examine whether other metals work just as well as gold. There is no need to fear. However, this would cause a car or a building to heat up more in the summer. The researchers have already filed a patent. Hopefully, this groundbreaking product will soon be available on the market.；4. How does the new coating work to remove fog?A．By reflecting part of sunlight selectively.B．By keeping cool air away from the object.C．By creating a thin film of water on the surface.D．By absorbing infrared radiations to heat the coating.；5. Why does the author mention previous anti-fogging products?A．To stress the advantages of the new coating.B．To introduce the inspiration behind the new coating.C．To prove the difficulty of creating anti-fogging products.D．To explain the reason for the anti-fogging coating being popular .；6. What is the limitation of the new coating?A．It is considerably expensive.B．It depends on sunlight to work.C．It takes too much time to produce.D．It is difficult to clean and maintain.；7. What do the researchers plan to do next?A．Apply for a patent for the invention.B．Develop the product for more practical uses.C．Explore the environmental impact of the coating.D．Seek a cheaper material as an alternative to gold.CAn exhibition of vivid photographs and a restored documentary give fresh insight into the Antarctic explorer, who died a century ago.One hundred years ago, the leader of the last great expeditio n of the heroic age of polar exploration died from a heart attack as his ship, Quest, headed for Antarctica. The announcement of the death of Ernest Shackleton on 30 January 1922 was greeted with an outpouring of national grief.This was the man, after all, who had saved the entire crew of his ship Endurance —which had been crushed and sunk by ice in 1915 — by making a daring trip in a tiny open boat over 750 miles of polar sea to raise the alarm at a whaling station in South Georgia.It remains one of the greatest rescue stories of modern history and led to the idolising of Shackleton in the United Kingdom, a reputation that survived undamaged for the rest of the century. As his contemporary Raymond Priestley, the geologist and Antarctic explorer, later put it: “When disaster strikes and all hope is gone, get down on your knees and pray for Shackleton.”And here and now in 2022, his death is being marked with an elaborately illustrated exhibition —Shackleton’s legacy and the power of early Antarctic pho tography — which opens at the Royal Geographical Society (RGS), and which includes a range of images and artefacts from his expeditions. Additionally, a digitally remade version of South, a documentary film of Shackleton’s 1914-16 Endurance expedition, is being screened at the British Film Institute.The film and most of the exhibition’s finest images are the handiwork of Frank Hurley, who sailed with Shackleton and who was one of the 20th century’s greatest photographers and film-makers. Both film and exhibition feature striking camera work and provide vivid accounts of the hardships that Shackleton and his men endured as they headed off to explore Antarctica.Even after he survived the great expedition, he still longed for another trip to Antarctica, and after long negotiations set sail in Quest, from England, with the aim of circumnavigating (环航) Antarctica, Shackleton was by now very ill and had suffered at least one heart attack. On 2 January 1922, he wrote in his diary: “I grow old and tired but must a lways lead on.” Three days later he had a major heart attack and died a few hours later. He is buried on South Georgia, scene of his greatest triumph.“Shackleton was an inspirational leader. He had an innate sense of what was possible and achievable. He also had a huge personality but led by example. At the same time, he was sensitive to the needs of the individuals he was leading. For example, after Endurance broke up, his men had lost their protection and shelter. Their social fabric had been destroyed. There would have been disagreement. Yet Shackleton succeeded in keeping them together and made sure they survived.”8. People were overcome with grief when Ernest Shackleton died because .A．it was a huge pity that such a brave explorer should ha ve died from a heart attack B．he was the man that wrote about one of the greatest rescue stories of modern history C．he came to his entire crew’s rescue and symbolised hope in extreme circumstances D．there was no one to pray to anymore when disaster came and there was no hope9. What can we learn about the exhibition?A．It presents Shackleton’s 1914-16 Endurance expedition with powerful Antarctic photos.B．It celebrates the 100th anniversary of the great explorer Ernest Shackleton’s birth. C．It consists of vivid photographs, artefacts, and documentaries of Ernest Shackleton.D．It is created by Frank Hurley, who witnessed Shackleton’s heroic acts with his own eyes.10. Which of the following is NOT true about Ernest Shackleton according to the passage? A．He was the leader of a heroic exploration to the South pole, who died from a heart attack off shore.B．He saved the crew members of the sunken Endurance by travelling to raise the alarmin a tiny boat.C．He is universally recognised as the greatest Antarctic explorer who has enjoyed enduring fame.D．He was inspirational, practical, responsible, sensitive towards his men, but had a strong character.11. What does “Their social fabric had been destroyed. ” in the last paragraph most probably mean?A．What they wore would not be accepted by others upon returning.B．They could no longer socialise with others even if they went back.C．The ship could not keep them together even if they survived.D．They could not function socially as they had when there was shelter.二、七选五阅读Do you want lots of success in school and in your friendship? If you want to learn how to balance your friendship and study, read on.• Talk about your goals for school.Share what academic success looks like for both of you. 12 Before the semester starts, sit down and discuss what you’d both like to achieve.• Share tips and tricks with each other.Exchange study techniques to learn how to be more successful. Maybe you know some learning methods like making a list of key ideas and reviewing them one hour a day. Chat about how you’ll both try to master your subjects. 13• Remind each other to take your health seriously.Put your wellness above everything else to succeed in school. 14 Get at least 8 hours of rest. Make sure to eat nutritious meals that will keep you energized. When you take care of yourselves, you’ll both reduce stress and improve your academic performances.• 15Remember that you both can overcome any challenge s with enough effort. In orderto get the most out of your studies, keep a “growth mindset”, an optimistic outlook that lets you see any difficult topic or task as an opportunity to learn.• Prioritize (优先安排) exams and finals.16 When you and your friend are in the middle of a finals week or have a huge assignment to prepare for, that should come first. Block out times on your schedules that need all your focus.A．Keep positive attitudes about school.B．Fight for any challenges enthusiastically.C．Your methods will be always encouraging.D．Give each other space during more intense periods.E．It’s important to be clear about what your goals are.F．You’ll lift each other up and get an extra edge in class.G．So you can both be at your best physically and mentally.三、完型填空When I was 13, I climbed my first mountain near my home. I was overweight thenand 17 when I reached the top. But I loved the 18 .Two years ago, my friend Mel Olsen and I drove to Oregon to climb 11,240-foot Mount Hood.As we went higher, the trail (山路) grew 19 and steeper. At around 9 a.m., we reached an ice step. Confident I was safe, I put my full 20 on it. Suddenly, I heard a 21 , and the ice broke off the step, right under my foot.In a second, I fell backward. Soon, I came to a stop on a flat slope. I 22 my whole body, feeling 23 that I was fine, except that I was suffering from a sharp painin my left 24 and couldn’t move.I 25 for help, and immediately Mel and other climbers came to assist me and called Mountain Rescue. Then I was loaded into a(n) 26 and taken to a hospital,27 I stayed for four days. The doctors told me it would be a year before I could 28 again, but I was back on the trails within six months.The fall has made me more 29 . One slip (滑倒) on a mountain can change everything. But the experience also made me 30 as a person. Since the accident, I’ve climbed another 60 mountains. I’m not going to let one fall 31 me from doing my favorite thing.17. A．out of danger B．out of trouble C．out of balance D．out of breath18. A．opportunity B．memory C．challenge D．mountain19. A．wider B．flatter C．narrower D．nearer20. A．body B．strength C．foot D．weight21. A．cry B．crack C．crash D．call22. A．calmed B．looked C．tested D．checked23. A．fortunate B．satisfied C．grateful D．confident24. A．arm B．shoulder C．leg D．eye25. A．yelled B．asked C．begged D．arranged26. A．car B．ambulance C．truck D．shelter27. A．which B．that C．where D．when28. A．jump B．move C．drive D．climb29. A．positive B．cautious C．frightened D．anxious30. A．grow B．develop C．feel D．act31. A．protect B．ban C．addict D．keep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。

九年级英语限时训练(附参考答案)

九年级英语限时训练（附参考答案）（满分28分时间25分钟）一、完形填空（共10小题；每小题1分，满分10分）阅读下面短文，掌握其大意，然后从每题所给的A、B、C三个选项中，选出能填入短文相应空白处的最佳选项，并在答题卡上将该项涂黑。

Every school has rules for students to follow.However,some students may see the 1as a way which teachers control them. Sometimes, they're unhappy and even feel 2 .Well,if you think your life is hard,you might think about the 3 in ancient times. For some of them,life was really hard.In the old days, people believed that teachers had to be very 4 and had the right to punish the students. Parents didn't mind if teachers punished their children when their children didn't do what they were 5 to do. Often, the stricter a teacher was, the more parents thought he or she was a good teacher.In fact,following school rules can be very important. For example,running in the hallways could cause a student to 6 .It may hurt himself or another person. Following the rules can also help the students in the classroom to learn 7 difficulty. In class, a teacher may ask students to raise their hands 8 they speak. If someone speaks out of turn,other students might not be able to hear the teacher 9 .School rules can help Students prepare for their own futures as well. When they 10 and go out on their own, they'll soon find that they still need to follow rules.Rules make the world much better.If there are no rules, life will be meaningless and in disorder.1. A.rules B.excuses C.facts2. A.tired B.angry C.excited3. A.students B.parents C.teachers4. A.kind B.clever C.strict5. A.told B.heard C.invited6. e out B.fall down C.move on7. A.about B.from C.without8. A.because B.though C.before9. A.clearly B. luckily C.quickly10. A.hurry up B. look up C.grow up二、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。

2023-2024学年高一下学期英语限时训练-7 答案解析

高一英语限时训练7 答案解析阅读理解A 篇本文为一篇记叙文。

讲述了来自法国的24岁男子Guirec Soudee选择了和他的宠物鸡一起环游世界的故事。

1. A.细节理解题。

根据第一段“Guirec Soudee, a 24-year-old man from France, chose his pet chicken.”。

Guirec Soudee和他的宠物鸡一同旅行。

故选A项。

2. D. 细节理解题。

根据第三段“He believed they could communicate with each other well.”及第四段“Not only does it cost little to raise Monique, but she lays eggs as well — some things that are always a plus in a situation where storing a lot of food can be a challenge.”可知，宠物鸡不仅能够听Guirec Soudee说话，还能够下蛋给他作为食物，因此选择Monique作为他的同伴。

故选D项。

3. C.词句猜测题。

根据第五段“Usually Soudee lets Monique stay freely on the boat, but when the winds get terrible he ensures she is safe in her hutch so that she doesn’t fall out of his boat and into the sea.”及第六段“She follows me everywhere. All I need to do is shout ‘Monique!’ and she will come to me, sit on me, listen to my small talk and give me company,” he said.”可知，Monique有时候会使Soudee生气，但是大多数情况下还是比一个人陪伴他旅行更加合适。

2023年中考数学基础满分挑战训练四十分钟限时练习卷十含答案解析

40分钟限时练习（10）一．选择题（共8小题，满分24分，每小题3分）1．（3分）若实数a满足|a|a=―1，则（）A．a＞0B．a＜0C．a≥0D．a≤0【分析】根据绝对值的性质，正数的绝对值是它的本身，负数的绝对值是它的相反数，0的绝对值是0，即可作出判断．【解答】解：根据|a|a=―1，可得|a|＝﹣a，且a≠0则a一定是负数，即a＜0．故选：B．【点评】本题主要考查了绝对值的性质，容易忽视的问题是a≠0这一条件，错选D．2．（3分）下列计算正确的是（）A．x•x＝2x B．x+x＝2x C．（x3）3＝x6D．x3÷x＝x3【分析】直接利用同底数幂的乘除运算法则以及合并同类项法则、幂的乘方运算法则分别判断得出答案．【解答】解：A．x•x＝x2，故此选项不合题意；B．x+x＝2x，故此选项符合题意；C．（x3）3＝x9，故此选项不合题意；D．x3÷x＝x2，故此选项不合题意；故选：B．【点评】此题主要考查了幂的乘方运算、合并同类项、同底数幂的乘除运算，正确掌握相关运算法则是解题关键．3．（3分）在一次中学生田径运动会上，参加男子跳高的14名运动员的成绩如表所示：成绩/m1.501.611.661.701.751.78人数232151则这些运动员成绩的众数是（）A．1.66m B．1.67m C．1.68m D．1.75m【分析】根据众数的定义直接解答即可．【解答】解：∵175出现了5次，出现的次数最多，∴这些运动员成绩的众数是175m；故选：D．【点评】本题考查众数，解题的关键是明确众数的定义，会找一组数据的众数．4．（3分）将抛物线y＝x2+1的图象绕原点O旋转180°，则旋转后的抛物线的函数关系式（）A．y＝﹣x2B．y＝﹣x2﹣1C．y＝x2﹣1D．y＝﹣x2+1【分析】根据关于原点对称的两点的横坐标纵坐标都互为相反数求则可．【解答】解：根据题意﹣y＝（﹣x）2+1，化简为y＝﹣x2﹣1．故选：B．【点评】考查根据二次函数的图象的变换求抛物线的解析式．5．（3分）关于x的不等式组2x―3≥x―53x+a≥4x―3只有3个整数解，则a的取值范围为（）A．﹣3≤a＜﹣2B．﹣3≤a≤﹣2C．﹣3＜a≤﹣2D．﹣3＜a＜﹣2【分析】先求出每个不等式的解集，根据已知不等式组只有3个整数解得出不等式组，求出不等式组的解集即可．【解答】解：2x―3≥x―5①3x+a≥4x―3②，解不等式①，得x≥﹣2，解不等式②，得x≤a+3，∵关于x的不等式组2x―3≥x―53x+a≥4x―3只有3个整数解（3个整数解是﹣2，﹣1，0）∴0≤a+3＜1，∴﹣3≤a＜﹣2，故选：A．【点评】本题考查了解一元一次不等式组和不等式组的整数解，能得出关于a的不等式组0≤a+3＜1是解此题的关键．6．（3分）如图，圆锥的底面圆半径r为5cm，高h为12cm，则圆锥的侧面积为（）A．65πcm2B．60πcm2C．100πcm2D．130πcm2【分析】根据圆锥的侧面积公式：S＝πrl，直接代入数据求出即可．【解答】解：由圆锥底面半径r＝5cm，高h＝12cm，根据勾股定理得到母线长l=r2+ℎ2=13cm，根据圆锥的侧面积公式：πrl＝π×5×13＝65πcm2，故选：A．【点评】此题主要考查了圆锥侧面积公式，熟练地应用圆锥侧面积公式求出是解决问题的关键．7．（3分）如图，给出下列条件①∠CAD＝∠ACB；②∠CAB＝∠ACD；③AD∥BE且∠D ＝∠B；其中能推出AB∥DC的条件个数是（）A．0个B．1个C．2个D．3个【分析】利用内错角相等两直线平行，等量代换，同旁内角互补，两直线平行即可得到结果．【解答】解：①∠CAD＝∠ACB，可判定AD∥BC，不能判定AB∥DC；②∠CAB＝∠ACD，可判定AB∥CD；③AD∥BE可得∠D+∠BCD＝180°，再由∠D＝∠B，可得∠B+∠BCD＝180°，可判定AB∥CD．所以能推出AB∥DC的条件个数是2个，故选：C．【点评】此题主要考查了平行线的判定，解题的关键是掌握判定定理：同位角相等，两直线平行．内错角相等，两直线平行．同旁内角互补，两直线平行．8．（3分）如图，在△ABC中，∠B＝90°，AB＝6cm，BC＝12cm，动点P从A开始沿边AB向点B以1cm/s的速度移动，动点Q从B开始沿边BC向点C以2cm/s的速度移动，如果P、Q两点分别从A、B两点同时出发，则四边形APQC的面积的最小值是（）A．9B．18C．27D．36【分析】根据等量关系“四边形APQC的面积＝三角形ABC的面积﹣三角形PBQ的面积”列出函数关系求最小值．【解答】解：设P、Q同时出发后经过的时间为ts，四边形APQC的面积为S cm2，则有：S＝S△ABC﹣S△PBQ=12×12×6―12（6﹣t）×2t＝t2﹣6t+36＝（t﹣3）2+27．∴当t＝3s时，S取得最小值为27．故选：C．【点评】本题考查了函数关系式的求法以及最值的求法，解题的关键是根据题意列出函数关系式，并根据二次函数的性质求出最值．二．填空题（共8小题，满分32分，每小题4分）9．（4分）据测算，我国每年因沙漠造成的直接经济损失超过5400000万元，这个数用科学记数法表示为　5.4×106　万元．【分析】在实际生活中，许多比较大的数，我们习惯上都用科学记数法表示，使书写、计算简便．将一个绝对值较大的数写成科学记数法a×10n的形式时，其中1≤|a|＜10，n为比整数位数少1的数．【解答】解：5400000＝5.4×106万元．故答案为5.4×106．【点评】用科学记数法表示一个数的方法是（1）确定a：a是只有一位整数的数；（2）确定n：当原数的绝对值≥10时，n为正整数，n等于原数的整数位数减1；当原数的绝对值＜1时，n为负整数，n的绝对值等于原数中左起第一个非零数前零的个数（含整数位数上的零）．10．（4分）若二次根式3x―1有意义，则x的取值范围是　x≥13　．【分析】根据二次根式的性质，被开方数大于等于0，就可以求解．【解答】解：根据二次根式有意义，得：3x﹣1≥0，解得：x≥1 3．故答案为：x≥1 3．【点评】本题考查二次根式有意义的条件，知识点为：二次根式的被开方数是非负数．11．（4分）若代数式2a2+3a+1的值是6，则代数式6a2+9a+3的值为　18　．【分析】根据已知代数式的值确定出2a2+3a的值，原式变形后代入计算即可求出值．【解答】解：∵2a2+3a+1＝6，即2a2+3a＝5，∴原式＝3（2a2+3a）+3＝15+3＝18，故答案为：18【点评】此题考查了代数式求值，熟练掌握运算法则是解本题的关键．12．（4分）如图，在△ABC中，∠ACB＝90°，M、N分别是AB、AC的中点，延长BC 至点D，使BD＝3CD，连接DM、DN、MN．若AB＝6，则DN＝　3　．【分析】连接CM，根据直角三角形的性质求出CM，根据三角形中位线定理、平行四边形的判定定理证明四边形NDCM是平行四边形，根据平行四边形的性质解答．【解答】解：连接CM，∵∠ACB＝90°，M是AB的中点，∴CM=12AB＝3，∵M、N分别是AB、AC的中点，∴MN=12BC，MN∥BC，∵BD＝3CD，∴BC＝2CD，∴MN＝CD，又MN∥BC，∴四边形NDCM是平行四边形，∴DN＝CM＝3，故答案为：3．【点评】本题考查的是三角形中位线定理、直角三角形的性质，掌握三角形的中位线平行于第三边，并且等于第三边的一半是解题的关键．13．（4分）某产品的合格率如表所示，购买这样的产品，合格的概率是　0.91　．（精确到0.01）抽取的件数51010020050080010002000合格产品数58881754517299091820合格品的频率10.80.880.8750.9020.9110.9090.910【分析】根据图表给出的合格品的频率即可得出答案．【解答】解：从上面的数据可以看出合格频率稳定在0.91附近，购买这样的产品，合格的概率是 0.91．故答案为：0.91．【点评】此题考查了利用频率估计概率．大量反复试验下频率稳定值即概率．熟记频率＝所求情况数与总情况数之比是解题的关键．14．（4分）若关于x 的分式方程3x +2x ―1=m x ―1有增根，则实数m 的值是 5　．【分析】分式方程去分母转化为整式方程，由分式方程有增根得到x ﹣1＝0，求出x 的值，代入整式方程求出m 的值即可．【解答】解：去分母得：3x +2＝m ，由分式方程有增根，得到x ﹣1＝0，即x ＝1，把x ＝1代入整式方程得：3+2＝m ，解得：m ＝5，故答案为：5．【点评】此题考查了分式方程的增根，增根确定后可按如下步骤进行：①化分式方程为整式方程；②把增根代入整式方程即可求得相关字母的值．15．（4分）如图，点A 的坐标为（1，2），AB ⊥x 轴于点B ，将△AOB 绕点A 逆时针旋转90°得到△ACD ，双曲线y =kx（x ＞0）恰好经过点C ，交AD 于点E ，则点E 的坐标为　（32，2）　．【分析】根据点A 的坐标求出OB 、AB ，根据旋转的性质可得AD ＝AB ，CD ＝OB ，然后求出点C 的横坐标与纵坐标，从而得到点C 的坐标，利用待定系数法求出反比例函数解析式，再根据点E 的纵坐标利用反比例函数解析式求出横坐标，从而得解．【解答】解：∵点A 的坐标为（1，2），AB ⊥x 轴于点B ，∴OB ＝1，AB ＝2，∵△AOB 绕点A 逆时针旋转90°得到△ACD ，∴AD ＝AB ＝2，CD ＝OB ＝1，∴点C 的横坐标为1+2＝3，纵坐标为2﹣1＝1，∴点C 的坐标为（3，1），∵双曲线y =kx（x ＞0）恰好经过点C ，∴k3=1，解得k ＝3，所以，双曲线为y =3x，∵△AOB 绕点A 逆时针旋转90°得到△ACD ，双曲线y =kx（x ＞0）交AD 于点E ，∴点E 的纵坐标为2，∴3x =2，解得x =32，∴点E 的坐标为（32，2）．故答案为：（32，2）．【点评】本题考查了坐标与图形变化﹣旋转，反比例函数图象上点的坐标特征，熟记旋转的性质并求出点C 的坐标是解题的关键，也是本题的难点．16．（4分）如图，正方形ABCD 的边长为12，点E 、F 分别为AB 、BC 上动点（E 、F 均不与端点重合），且AE +CF ＝4，P 是对角线AC 上的一个动点，则PE +PF 的最小值是 413　．【分析】作点E 关于AC 的对称点E '，则AE ＝AE '，PE ＝PE '，连接E 'F 交AC 于点P ，过F 作AD 的垂线交AD 于点G ，则E 'F 的长即为所求，由AD ＝8即可求出GE '的长，再由勾股定理即可求出E 'F 的长．【解答】解：作点E 关于AC 的对称点E '，连接PE ′、PF ，过F 作FG ⊥AD 于点G ，当P 、E '、F 在同一直线上时，PE +PF ＝PE '+PF ＝E 'F ，此时PE +PF 最小，即E 'F 即为所求．∵四边形ABCD是正方形，∴∠DAC＝∠BAC＝45°，∴点E'在边AD上．∵GF⊥AD，∠D＝∠BCD＝90°，∴四边形CDGF是矩形，∴GD＝CF，∴GE'＝12﹣（GD+AE'）＝12﹣4＝8，在R t△GFE中，GE'＝8，GF＝12，∴E′F=FG2+E′G2=122+82=413．故答案为：413．【点评】本题考查的是最短路线问题，矩形的判定与性质，勾股定理及正方形的性质，根据题意作出辅助线是解答此题的关键．三．解答题（共4小题，满分44分）17．（10分）计算：（1）20080+|﹣1|―3cos30°+（12）3；（2）|3―2|―(―2)2+2sin60°．【分析】（1）分别根据0指数幂、绝对值的性质、特殊角的三角函数值及数的乘方法则分别计算出各数，再根据实数混合运算的法则进行计算即可；（2）分别根据绝对值的性质、特殊角的三角函数值及数的乘方法则分别计算出各数，再根据实数混合运算的法则进行计算即可．【解答】解：（1）原式＝1+1―3×32+18＝2―32+18=5 8；（2）原式＝2―3―4+2×32＝﹣2．【点评】本题考查的是实数的混合运算，熟知0指数幂、绝对值的性质、特殊角的三角函数值及数的乘方法则是解答此题的关键．18．（10分）先化简，再求值：1―a+1a2+2a÷a2+2a+1a3―4a，其中a＝2．【分析】先将原式中的分子和分母能进行因式分解的进行因式分解，然后先算除法，再算减法，最后代入求值．【解答】解：原式＝1―a+1a(a+2)⋅a(a+2)(a―2)(a+1)2＝1―a―2 a+1=a+1a+1―a―2a+1=3a+1，当a＝2时，原式=32+1=1．【点评】本题考查分式的化简求值，掌握分式混合运算的运算顺序（先算乘方，然后算乘除，最后算加减，有小括号先算小括号里面的）和计算法则是解题关键．19．（12分）随着课后服务的全面展开，某校组织了丰富多彩的社团活动．炯炯和露露分别打算从以下四个社团：A．快乐足球，B．数学历史，C．文学欣赏，D．棋艺鉴赏中，选择一个社团参加．（1）炯炯选择数学历史的概率为　14　．（2）用画树状图或列表的方法求炯炯和露露选择同一个社团的概率．【分析】（1）直接由概率公式求解即可；（2）画树状图，共有16种等可能的结果，其中炯炯和露露选择同一个社团的结果有4种，再由概率公式求解即可．【解答】解：（1）炯炯选择数学历史的概率为1 4，故答案为：1 4；（2）画树状图如下：共有16种等可能的结果，其中炯炯和露露选择同一个社团的结果有4种，∴炯炯和露露选择同一个社团的概率为416=14．【点评】本题考查的是用树状图法求概率．树状图法可以不重复不遗漏的列出所有可能的结果，适合两步或两步以上完成的事件．用到的知识点为：概率＝所求情况数与总情况数之比．20．（12分）为了了解学生参加体育活动的情况，学校对部分学生进行了调查，其中一个问题是：“你平均每天参加体育活动的时间是多少”，此题共有四个选项：A．1.5小时以上；B．1～1.5小时；C．0.5～1小时；D．0.5小时以下．下图是根据调查结果绘制的两幅不完整的统计图，请你根据统计图提供的信息解答以下问题：（1）本次一共调查了多少名学生？（2）在条形统计图中将选项D的部分补充完整；（3）若该校有1000名学生，你估计全校可能有多少名学生平均每天参加体育活动的时间在0.5小时以下？（4）请你根据统计图中提供的信息，再提一个问题，并回答该问题．【分析】（1）由图可知：A累类有60人，占20%即可求得总人数；（2）D部分所占的百分比为1﹣50%﹣30%﹣15%＝5%，乘以总人数即可算得；（3）该校有1000名学生中平均每天参加体育活动的时间在0.5小时以下的学生人所占的比例是1﹣50%﹣30%﹣15%，乘以总人数即可求解；（4）若该校有1500名学生，你估计全校可能有多少名学生平均每天参加体育活动的时间在0.5小时以上．【解答】解：（1）60÷30%＝200或100÷50%＝200或30÷15%＝200，答：本次一共调查了200名学生；（2）图如下面所示：（3）1000×（1﹣50%﹣30%﹣15%）＝50，答：全校可能有50名学生平均每天参加体育活动的时间在0.5小时以下．（4）若该校有1500名学生，你估计全校可能有多少名学生平均每天参加体育活动的时间在0.5小时以上（只要能根据图中信息提出问题并正确回答问题即可得分）．【点评】本题考查的是条形统计图和扇形图的综合运用，读懂统计图，从不同的统计图中得到信息是解决问题的关键．。

2023届高三英语晚自习限时训练(含答案)

2023届高三英语晚自习限时训练一、阅读理解AFAIREMONT HOTEL Five Waiters and Ten Waitresses: Aged: under 22. At least high school graduates. Good-looking men at least 1.72 meters tall and women at least 1.65. Paid: 1600-2200 dollars per month. One secretary: Aged: under 30. Females favored Good at writing and skilled at computers. Tel:465-4768 Paid: 2500—3000 dollars per month WILSON BOOKSTORE Accountant (会计): Aged: 25 and 40. With an experience of at least two years. With a degree and an accountant certificate. With a practical knowledge of computer. Paid: 3000-4000 dollars monthly. Computer Salesclerk: Aged: 25 or less. Basic education of 12 years or more. Good at computer. Paid: 1800-2200 dollars monthly. Tel: 447-4398 1. Which of the four jobs will be paid best monthly from the passage A．Computer Salesclerk. B．Accountant.C．Secretary. D．A waiter or waitress2. If you are good at writing, you can just find a job as .A．a secretary B．a waiter or waitressC．an accountant D．a salesclerk3. Where can we read the above information most probablyA．In an English bookstore. B．In a newspaper.C．In a hotel magazine. D．In a English TV channel.BHurricane Fiona, killing 16 people and bringing the power system to a 3-day stop, struck Puerto Rico, an island country located between Caribbean Sea and the North Atlantic Ocean, on September 18, almost five years after Hurricane Maria hit the island, showing that, as researchers have long warned, storms are now more frequent and cause more damage due to climate change.Back in 2017, Hurricane Maria killed thousands of people and left millions without power for a week. A study in 2019 found that the possibility of terrible events like Hurricane Maria hitting Puerto Rico is now almost five times higher due to climate change.The storms were similar in many ways but had their own features. Maria was a Category (类别) 4 hurricane whose speed was up to 155 mph, while Fiona, a Category 1 storm when it landed Puerto Rico, was gentler, with winds of up to 85 mph, which later increased to 115 mph as the storm progressed through the island.And yet, the heavy rain caused by Fiona brought Puerto Rico to its knees. According to the data by the National Oceanic and Atmospheric Administration, the slow moving storms brought 15.80 inches of rain over a 5-day period, slightly more than Maria at 14.72 inchesThis confirms another long-held thought that, with climate change, horrible storms will not only become more common but also wetter.That’s because the increase in temperatures is leading to more loss of water from the sea and warmer air can hold more water vapor (水蒸气). The average temperature all over the world has already increased by nearly 1.2℃ due to climate change and for each 1℃ of warming, the air’s ability to hold water is thought to increase by about 7%. The latest research suggests that the increase may be three times higher, at 21%.；4. What was a direct cause of more storms in Puerto RicoA．Loss of forests. B．Puerto Rico’s location.C．Human activity. D．Climate change.；5. Compared with Maria, what’s the feature of Fiona progressing through Puerto RicoA．It brought less rain. B．It moved a bit slower.C．It caused a longer power cut. D．It brought more deaths.；6. What do the figures in the last paragraph showA．Rainfall increases with temperature rising.B．Puerto Rico is a place raining all the time.C．Storms are common in Puerto Rico.D．Slower storms cause more damage.；7. What’s the best title for the textA．Puerto Rico: Survival of PeopleB．Puerto Rico: Frequent FloodsC．Climate Change: Wetter Puerto RicoD．Climate Change: Disasters on Their Way to Puerto RicoCSheneman, a 33-year-old artist, was first diagnosed with diabetes(糖尿病) around five years ago, and she says it was a wake-up call. Since then, health has become a huge part of her life.What she realized while battling this condition, though, is that a lot of people weren’t aware of what she went through on a daily basis. “Which is crazy to think about because there are so many diabetics out there,” she said. So, Sheneman came up with an art project that would offer a deep understanding of what diabetics go through.On April 1, she started her journey, a 470-mile walk, from her college town of Cincinnati, Ohio, and her plan is to make it to her hometown of Memphis, Tennessee, by the end of the month.Throughout this journey, people will be able to watch her glucose(葡萄糖) levels through an app that’s connected to her glucose monitor, the Dexcom G6. The monitor provides real-time alerts when her glucose levels vary too high or low.This journey is more than just showing people how physically difficult this walk is. “I want them to understand what it looks like to be diabetic and constantly checking and making sure that you’re eating the right things,” she said, adding that “just something as simple as stress can raise your blood sugar.”Sheneman was told by health professionals to do something simple, like walking every day. However, Sheneman, who grew up backpacking, wanted to test the limits of what was possible. “I think it’s important to understand that being a diabetic is not necessarily limiting you,” she said. “There’s just the most difficult part that you have to get over.”8. Why did Sheneman start the art projectA．To raise people’s awareness of diabetes. B．To raise money for all the diabetics.C．To advertise for her hometown. D．To get sympathy for herself.9. What should Sheneman pay special attention to during the journey A．The reactions and concerns of others. B．The app connected to the Dexcom G6.C．The variation of her glucose levels. D．The physical difficulty the walk causes.10. Which of the following best describes the life of a diabetic like ShenemanA．Colorful. B．Cautious.C．Artistic. D．Adventurous.11. What message does Sheneman seem to convey in the last paragraph A．Sport helps gain confidence in fighting diseases.B．We don’t have to follow the doctor’s advice.C．Nothing can stop one achieving their goals.D．Our path in life will not always be smooth.二、七选五阅读We know that choosing a college major can be very tough. But have no fear! Your choice of major will not lock you into a specific career for the rest of your life. Here’s what you need to know about college majors before you choose.What is a major12 Beyond general college requirements, you’ll also take a group of courses in a subject of your choosing such as Chemistry, Literature, or Political Science.How important is my majorThe major you choose will neither predict nor guarantee your future. Many graduates find jobs that have nothing to do with what they studied in college. If you intend to earn a professional degree after college, you will probably need certain courses. 13 .When do I choose a majorThis varies widely across schools and programs. 14 . Others require that you decide upon a major by the time that you set foot inside your first class.15Definitely. One of the most exciting aspects of college life is that it introduces you to new subjects and arouses new passions. However,keep this in mind: every major has necessary coursework. If you change your major late in the game, it may take more than the traditional four years to earn a degree.What are minors and double majorsIf one field of study doesn’t satisfy your intellectual appetite, consider a minor. A minor is similar to a major in that it’s an area of academic concentration. 16 A double major provides you with an understanding or two academic fields. It allows you to become familiar with two sets of values and views while it also requires you to fulfill two sets of requirements.A．Can I change my mindB．Is my major time-consumingC．It’s your specialized area of study in college.D．Most students find one major is more than enough.E．Some schools may give you one year or more to decide.F．The only difference is that it doesn’t require as many classes. G．Many future science doctors major in non-science related fields.三、完形填空The year 2020 was a hard year. So many people thought of ideas to bring 17 to themselves or to others.Kimberly Wybenga was one of them. To cheer up her friends, she 18 10 small boxes and wrote out praises for 10 friends. Just 19 this brought herjoy so she bought 20 more boxes to spread the love even 20 ."I know everyone is 21 some kind of struggle and I just thought it would be nice to support them anyway I could," Wybenga said, " 22 I didn't know what they were going through."The 38-year-old tried to send her boxes of hope anonymously（匿名地）, 23 "a friend" on the bottom of each card. She mailed some packages and sent others to the doorsteps of those who were 24 to her home secretly. In order not to be 25 , she even dressed up herself in black and wore a mask so if people had 26 on doors, they wouldn't know it was her.All the effort to remain anonymous didn't 27 much of the time because Wybenga's 28 was recognized by some friends. Other looked up her 29 on the package and discovered it was her.Now she decided to share the story 30 , hoping to encourage someone else to spread 31 .17. A．luck B．happiness C．wealth D．advantage18. A．made B．borrowed C．bought D．created19. A．exchanging B．improving C．organizing D．doing20. A．further B．faster C．better D．earlier21. A．making up B．dealing with C．finding out D．thinking about22. A．because B．before C．though D．if23. A．signing B．checking C．contacting D．arranging24. A．addicted B．attracted C．close D．used25. A．refused B．seen C．forgotten D．recognized26. A．phones B．cameras C．sources D．solutions27. A．work B．appear C．happen D．leave28. A．face B．dress C．voice D．handwriting29. A．address B．picture C．name D．design30. A．slowly B．extremely C．obviously D．publicly31. A．knowledge B．warning C．kindness D．news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。

2023学年度第二学期八年级语文第一次限时训练(附答案)

2022-2023学年度第二学期八年级第一次限时训练语文试题（2023.3）（考试时间：150分钟满分：150分）请注意：所有试题的答案均填写在答题卡上，写在试卷上无效。

一、积累与运用（共26分）为了弘扬传统文化，丰厚学生的文化底蕴，靖江外国语八年级学生开展了“传承华夏文化，寻找中国元素”的主题活动，小敏所在的小组围绕日常生活中的“筷子”展开了一系列的探究，请你参与其中，完成1-5题。

1.下面是小敏同学搜集到的材料，阅读后，完成（1）—（4）题。

（共10分）①中国是筷子的发源地，中国人用筷子进餐至少有3000年的历史。

筷子在世界各国的餐具中（叹为观止/独树一帜），被西方人誉为“东方的文明”。

受到我国影响，筷子文化也fú（①）射到日本、越南、韩国和朝鲜等国家。

②筷子最初叫“箸（zhù）”或“梜（jiā）”，到了宋代才开始有“筷子”的称呼。

古人讲究忌讳，因“箸”与“住”谐音，【A】听着有“停滞不前”的意思，【B】故谓不吉利之语，特别是对于行船的人更是讳言，所以古人便反其意改“住”为“快”；加之筷子多以竹子为材料，所以又在“快”字上冠以“竹”字头而名“筷”，寄寓了人们对美好生活的向往。

③民以食为天轻便灵巧的筷子被人们餐餐使用，筷子文化逐渐融化在中国人的血液里。

中央电视台曾拍过一个主题为筷子的春节公益宣传片，通过八个不同地域的家庭在除夕使用筷子的故事，揭示了筷子所蕴含的丰富的传统文化和中国人特有的人情shìɡù（②），令人感动。

方寸之中有乾坤。

小小的筷子承载．（③）着中华民族几千年来深厚的文化内涵，是华夏民族智慧的结晶。

说它是饮食文化的“中国符号”，也是（名副其实/相辅相成）。

（1）根据拼音依次写出相应的汉字或给加点字注音。

（4分）助学资料①②③（2）结合上下文，文中横线所应填入成语正确的一项是（2分）（）A．独树一帜相辅相成 B．叹为观止相辅相成C．叹为观止名副其实 D．独树一帜名副其实（3）文中方框处依次填入标点全都正确的一项是（2分）（）A．句号引号 B．冒号引号C．句号书名号 D．冒号书名号（4）下面的语句是小敏在第二段中误删的，她已忘记文中原本的位置是【A】处还是【B】处，请你帮她做出正确的选择。

2023届高三英语晚自习限时训练(含答案)

2023届高三英语晚自习限时训练一、阅读理解AWhether you want to absorb yourself in luxury (奢华) or make memories thatwill last a lifetime, consider South Carolina for your next beach vacation!Folly BeachSometimes called one of America last true beach towns, Folly Island is charming, with clothing shops and seafood restaurants of every kind along Center Street. There’s something for everyone, whether you’re a surfer, cyclist, boater, you love fishing, or you’re interested in the island’s rich sea-wildlife, complex history, Folly Beach is a great place for culture too.Hilton HeadFamous for its luxury accommodations, low country-beaches, and 30 world-class golf courses, and 300 tennis courts, Hilton Head was the first eco-planned destination in the United States. While Hilton Head is famous for its expensive offerings, there’s plenty of exploring for families and nature lovers.Edisto BeachEdisto Beach is a great place for nature lovers. A vacation at Edisto beach includes adventure in the great outdoors. Hike, fish, and explore the beach. Edisto Beach provides affordable beach fun, like oceanfront and forest campsites.Bull IslandBull Island is known for its bird-life, with more than 293 species recorded there. Kids love spotting an American Bald Eagle. Naturalist-guided tours are great for all ages if observing black foxes is on your bucket list.1. Which beach best suits those who are eager to get experience in various activities as well as local culture?A．Folly Beach. B．Hilton Head. C．Edisto Beach. D．Bull Island.2. What is probably the major concern for tourists before going to Hilton Head? A．Safety. B．Cost. C．Location. D．Activities.3. What might make people choose Bull Island rather than Edisto Beach?A．Its sea-wildlife. B．Its golf-course. C．Its bird-life. D．Its campsites.BMost young, single Singaporeans live with their parents. But some are moving into their own places as social norms (规范) develop.When Alan, a civil servant willing to challenge and reform this conventional stereotype (陈规), decided to move out of his family home in Singapore, it still took the 27-year-old a month to talk about the topic with his parents. He feared they wouldn’t understand. After all, Alan’s home was a pleasant place. The family’s three-bedroom condominium (公寓) wasn’t far from the city-state’s central business district. There was homemade dinner on the table each night, and his laundry was always donefor him. “There wasn’t a push factor, just pull factors,” he says. “I’d lived with my parents my whole life, so I just wanted to experience what it’s like being by myself, you know?”In the West, leaving home is just another milestone in adulthood. Yet in most Asian societies, things are different. Culturally, moving out is sometimes considered as showing disrespect to your parents, which makes it even challenging and praiseworthy. In Singapore, living at home until marriage is a common practice; an estimated 97% of unmarried individuals lived with their parents in 2013.While the trend is in part driven by deep-rooted ideas of filial piety (孝道), it’s also linked to government policies on accommodation for young people. Most Singaporeans live in public housing units, apartments funded by the state that are known as HDBs. About 90% of those who live in HDBs own their home.Those who can’t buy HDBs can rent via the private property market — but costs are much higher. “These cost restrictions,” says Dr Chua, a professor of sociology, “effectively keep most young, unmarried people living at home with their parents.”Yet Alan, who now rents a flat in Hougang with two friends from junior college, is among the courageous young pioneers resisting the long-time cultural norm. These commendable young people are deciding that the price of the freedom to organize their own life is worth it and stepping out of their home.；4. What can we know from the second and third paragraphs?A．The East and the West are very different in most aspects.B．Alan decided to live separately mainly due to some objective reasons.C．The majority of single young people followed social customs in living in 2013. D．In the East, it is culturally acceptable for the young to live separately from the elderly.；5. What mainly causes most single young people to live with their parents in Singapore?A．Their parents’ expectations.B．Their personal wish.C．The home environment. D．The traditional culture and housing prices.；6. What is the author’s attitude towards the young Singaporeans like Alan moving out? A．Confused. B．Positive. C．Indifferent. D．Doubtful.；7. What is the best title for the text?A．Young Singaporeans’ Relationship with Their ParentsB．Young Singaporeans Fighting Against Old Social CustomsC．Young Singaporeans Striking Out Their Way to IndependenceD．Young Singaporeans’ New Way to Solve High Housing PricesCEradajere Oleita thinks she may have a partial solution for two of our country’s continuous problems: garbage and poverty. It’s called the Chip Bag Project. The 26-year-old student and environmentalist from Detroit is asking a favor of local snacklovers: Rather than throw your empty chip bags into the trash, donate them so she can turn them into sleeping bags for the homeless.Chip eaters drop off their empty bags from Doritos, Lay’s, and other favorites at two locations in Detroit: a print shop and a clothing store, wher e Oleita and her volunteer helpers collect them. After they clean the chip bags in soapy hot water, they cut them open, lay them flat, and iron them together. They use materials from old coats to line the insides. It takes about four hours to make a sleepi ng bag, and each takes around 150 to 300 chip bags, depending on whether they’re single-serve or family size. The result is a sleeping bag that is “not allowed water to enter, not heavy, and not difficult to carry around,” Oleita said. Since its start in 2020, the Chip Bag Project has collected more than 800, 000 chip bags and created 110 sleeping bags since last December.Sure, it would be simpler to raise the money to buy new sleeping bags. But that’s only half the goal for Oleita — whose family moved to the United States from Nigeria a decade ago with the hope of achieving a better life－and her fellow volunteers. “We are devoted to making an impact not only socially, but environmentally,” she says.And, of course, there’s the symbolism of saving bags that would otherwise land in the trash and using them to help the homeless. It’s a powerful reminder that environmental injustice and poverty often go hand in hand. As Oleita stated, “I think it’s time to show connections between all of these issues.”8. What’s the aim of the Chip Bag Project?A．To draw the snack lover’s attention to the homeless.B．To change the chip bags into sleeping bags for the homeless.C．To recycle the garbage to remove the poverty for the country.D．To help solve the environmental pollution caused by chip bags.9. What can we learn from Para. 2?A．Chip eaters can place the empty bags wherever they want.B．Eradajere Oleita collects the empty chip bags independently.C．The sleeping bags are tough but not easy to carry around.D．The procedure of making a sleeping bag needs masses of chip bags.10. What does the words mean by Oleita in Para. 3?A．The environmental issues should be stressed.B．Poverty should be lifted out of the homeless.C．The Chip Bag Project will impact the society and environment.D．The Chip Bag Project will be devoted to achieving a better life.11. What can be inferred from the text?A．Chip bags are always used to help the homeless.B．Chip bags are only useful in addressing the environmental problems.C．The issues of environment and poverty will be stressed in the future. D．Environmental injustice and poverty are disconnected with each other.二、七选五阅读It is very important to keep fit and stay healthy. A lot of people fail to believethe good that daily exercise does to health and only begin to do so when they suffer from health problems. 12Regular(经常的)exercise helps you keep in good shape. Maybe, you are one ofthe many overweight people struggling with problems of body shape, yet you do not want to do anything about that. Sometimes you see very nice clothes, but they don’tfit you because of your body size. 13Doing exercise keeps you thinking quickly at all times. It’s a perfect way of developing the strength of your mind. 14 Besides, there is a reason why most athletes are usually happy. The release(释放)of dopamine (多巴胺) when doing exercise changes their feelings for the better. 15 Run around the blocks each morning, jog or lift weights and see how much good doing exercise does to your m ind.The good of doing exercise every day is endless, but a lot of people pay no attention to it and finally develop lifestyle-related illnesses later in life. So taking exercise is very important and some of the results of not taking exercise are very serious.16 Having fitness goals that mean something to you will help you keep a strict fitness schedule and achieve the result you want. Besides, using fitness trackers, you can monitor your general physical activity and find out whether you have mad e progress.A．Then why is it important to stay fit?B．How can you drive yourself to exercise?C．Setting high goals for exercise is very important.D．Everyone hopes to live a relaxing and comfortable life.E．So keeping your body active improves the work of your brain.F．Fitness exercise will help you lose extra fat and be in great shape.G．Maybe not having enough exercise is the reason for your easy anger.三、完型填空I have a friend named Monty Roberts who owns a horse ranch (牧场). He has let me use his 17 to raise money for poor students. 18 I was there he introduced me by saying, “I want to tell you why I let Jack use my house. It all goes back to a story about a boy who was the son of a poor horse trainer.”One day the boy was 19 to write a paper about what he wanted to do whenhe grew up. He wrote a paper describing his 20 of someday owning a horse ranch. Two days later he 21 his paper back. On the front page was a large red “F” with a note 22 , “See me after class.”The boy went to see the teacher after class and asked, “Why did I receive an F?” The teacher said, “This is a(n) 23 dream for a young boy like you. You have no coins. Owning a horse ranch requires a lot of money.” Then the teac her added, “Ifyou 24 rewrite this paper with a more realistic goal, I will 25 your grade.” The boy went home and thought about it long and hard. Finally, the boy 26 thesame paper, making no 27 at all. He said, “You can keep the F and I’ll keep my 28 .”Having told the story, Monty said, “I tell you this story 29 you are sitting on my 200-acre horse ranch. I still have that school paper 30 over the fireplace.” He added, “The best part of the story is t hat the same teacher brought 30 kids to camp out on my ranch for a week.”When the teacher was leaving, he said, “Look, Monty, I can tell you this now. When I was your teacher, I was something of a dream 31 . Fortunately you had enough determination not to give up.” Don’t let anyone steal your dreams. Follow your heart, no matter what happens.17. A．horse B．house C．ranch D．fame18. A．Next time B．The moment C．Each time D．Last time19. A．forced B．encouraged C．asked D．ordered20. A．process B．goal C．possibility D．chance21. A．accepted B．sent C．received D．put22. A．writing B．printing C．telling D．reading23. A．unrealistic B．unlucky C．inspiring D．practical24. A．must B．will C．shall D．may25. A．reconsider B．rediscover C．regain D．reinvent26. A．took in B．handed out C．turned in D．carried on27. A．money B．decisions C．mistakes D．changes28. A．word B．promise C．spirit D．dream29. A．because B．though C．when D．but30. A．delivered B．repaired C．framed D．taken31. A．stealer B．seeker C．giver D．maker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。

高考数学客观题限时训练习题及参考答案(十一套)

高考数学客观题限时训练习题（十一套）高考数学客观题限时训练一班级姓名学号记分1、已知集合{}{}|12,|35A x a x a B x x =-≤≤+=<<，则能使A B ⊇成立的实数a 的取值范围是（）A ．{}|34a a <≤B ．{}|34a a <<C ．{}|34a a ≤≤D ．∅ 2、等比数列{}n a 中，0n a >且21431,9a a a a =-=-，则45a a +等于（） A ．16 B ．27 C ．36 D ．27- 3、不等式2103x x -≤的解集为（）A ．{|2x x ≤≤ B ．{}|25x x -≤≤ C ．{}|25x x ≤≤ D ．{}5x x ≤ 4、曲线24y x =关于直线2x =对称的曲线方程是（）A ．2164y x =-B ．284y x =-C ．248y x =-D ．2416y x =-5、已知()321233y x bx b x =++++是R 上的单调增函数，则b 的范围（）A ．1b <-或2b >B ．1b ≤-或2b ≥C ．12b -<<D ．12b -≤≤6、直线l 是双曲线()222210,0x y a b a b-=>>的右准线，以原点为圆心且过双曲线的焦点的圆被直线l 分成弧长为21∶的两段圆弧，则该双曲线的离心率是（）A B C D7、空间四点A B C D 、、、，若直线,,AB CD AC BD AD BC ⊥⊥⊥同时成立，则A B C D 、、、四点的位置关系是（）A ．一定共面B ．一定不共面C ．不一定共面D ．这样的四点不存在8、()f x 是定义在R 上的奇函数，它的最小正周期为T ，则2T f ⎛⎫- ⎪⎝⎭的值为（）A ．0B ．2TC ．TD ．2T-9、已知实数x y 、满足22326x y +=，则2x y +的最大值为（） A ．4 BC． D10、函数222x y e -=的图象大致是（）选择题答案栏11、直线20x y m ++=按向量()1,2a =--平移后与圆22:240C x y x y ++-=相切，则实数m 的值为____________.12、在()()10211x x x ++-的展开式中，4x 项的系数是_______________.13、12名同学分别到三个不同的路口进行车流量的调查，若每个路口4人，则不同的分配方案共有____________14、函数()f x =是奇函数的充要条件是____________ABCD15、260100x y x x y +-≤⎧⎪+≥⎨⎪-≤⎩,z mx y =+取得最大值的最优解有无数个，则m 等于16、在下列四个命题中，①函数2cos sin y x x =+的最小值是1-。

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限时训练参考答案
限时训练1：一、二.选择题题号 1 2 3 4 5 6 7 8 9 10 答案
C
D
D
C
B
C
AC
CD
CD
BC
三．计算题 2:3 2:1
限时训练2：一、二.选择题题号 1 2 3 4 5 6 7 8 9 答案
C
C
B
D
B
BC
BD
BD
AD
三．计算题 10．解：⑴
-（2分）
⑵
-（2分）
⑶A 点场强仍为
--2分）
限时训练3：一、二.选择题题号 1 2 3 4 5 6 7 8 9 答案 D
A
C
A
C
CD
AB
BC
AC
三．计算题
10 解：（1）点电荷在A 点所受电场力F 的方向如答图所示
（2）点电荷的电荷量 q =F E
= 1 .0× 10-8 C
限时训练4：一、二.选择题
题号 1 2 3 4 5 6 7 8 9 10 答案
C
D
B
A
B
AC
CD
BC
BD
AD
11.（1）A 、C 、D 、F 、H （2）外（3）0.48
2.20
限时训练5：一、二.选择题
题号 1 2 3 4 5 6 7 8 9 10 答案
B
C
B
C
C
AD
AC
BD
AC
BC
11.(1) (B) (2) 750 10 (3)9.5 50 限时训练6：一、二.选择题
题号 1 2 3 4 5 6 答案
B
C
AD
BC
CD
BC
7.答案：（1）13.55mm （2）0.680 mm （3）○1 ×1 欧姆调零 12或12.1Ω ○2 a. A C E b. B
A
E
F
爱心责任奉献
解析：设粒子刚好打在上极板左边缘时(如图所示)．
R 1＝d 4，又由Bq v ＝m v 2
r ，得R 1＝m v 1Bq ，
解得v 1＝Bqd
4m
.
设粒子刚好打在上极板右边缘时，
由图知：R 22＝L 2
＋(R 2－d 2)2，所以R 2＝4L 2＋d 24d
，
又R 2 ＝ m v 2Bq ，解得v 2＝Bq (4L 2＋d 2)
4md
.
综上分析，要使粒子不打在极板上，
其入射速率应满足以下条件：
v <Bqd
4m 或 v 2>Bq (4L 2＋d 2)4md
答案：v <Bqd
4m 或 v 2>Bq (4L 2＋d 2)4md
限时训练七：一、二.选择题
三．非选择题：
10.解：由题意可知，导电棒在运动的过程中受到安培力和摩擦力的作用，如图所示：
由左手定则可知，磁场方向向上；
当电流为2A 时，导电棒作匀速运动，有
f L BI =1 （1）当电流为4A 时，有：ma f L BI =-2 （2）由（1）（2）得：B=0.3T 限时训练八：一、二.选择题
10、解：① 由粒子进磁场后的运动轨迹可判定该粒子带负电，负电荷在电场中被加速，电场力做正功，∴ U S2 > U S1
② 粒子经加速电场加速有 2
2
1mv qU =
进入匀强磁场做匀速圆周运动，轨道半径 qB mv R = 由上面两式可得粒子荷质比 6
2222108.3)
385.0100.5(70522⨯=⨯⨯⨯==-B R U m q 库/千克
三．非选择题：
10、解：
三．非选择题：
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解析 t ＝0时刻的磁感应强度：B 1＝2＋3×0＝2 T
t ＝1 s 时刻的磁感应强度：B 2＝2＋3×1 T＝5 T
磁通量的变化量：ΔΦ＝Φ2－Φ1＝B 2S sin θ－B 1S sin θ＝0.015 Wb. 答案 0.015 0.015
10.（1）E = BLv 0=5V ，(2分) S 闭合前，U=E =5V(2分)
S 闭合后，I=E /（R+r ）=0.5A ，(2分)
U=E-Ir =4.5V ；(2分)
（2）P=Fv=BIlv
=2.5W(2分) 10.解析：(1)电流稳定后，导体棒做匀速运动，受力平衡，
有F 安＝G ，即BIL ＝mg ①(2分) 解得B ＝mg IL
②(2分) (2)由法拉第电磁感应定律得导体棒产生的感应电动势E ＝BLv ③(1分)
闭合电路中产生的感应电流I ＝E R ④(1分) 由②③④式解得v ＝I 2R
mg
(2分)
(3)由题意知,导体棒刚进入磁场时的速度最大,设为v m ,
由机械能守恒定律得12
mv 2
m ＝mgh (2分) 感应电动势的最大值E m ＝Blv m (1分)
感应电流的最大值I m ＝E m R (1分)解得I m ＝mg 2gh IR .(2分)答案：(1)mg IL (2)I 2R mg (3)mg 2gh
IR。

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