上海高考专题训练-六选四强化篇-第2次专练-上海七宝中学专项训练汇总二
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一、单选题二、多选题1. 在正方体中,M ,N ,P 分别为棱、、的中点(如图),用过点M ,N ,P 的平面截去该正方体的顶点所在的部分,则剩余几何体的正视图为A.B.C.D.2. 点到双曲线渐近线的距离为,则双曲线的离心率等于( ).A.B.C.D.3. 已知复数z满足,且,则( )A.B.C .2D.4. 已知复数满足(是虚数单位),则( )A.B .4C.D .55. 已知边长为2的等边三角形,为的中点,以为折痕进行折叠,使折后的,则过,,,四点的球的表面积为( )A.B.C.D.6. 已知,,,则A.B.C.D.7. 为了得到函数的图象,需要把函数的图象( )A.向左平移个单位长度B .向右平移个单位长度C.向左平移个单位长度D .向右平移个单位长度8. 已知函数的零点是以为公差的等差数列.若在区间上单调递增,则的取值范围为( )A.B.C.D.9. 若,则( )A.B.上海市七宝中学2022届高三高考冲刺模拟2数学试题(1)上海市七宝中学2022届高三高考冲刺模拟2数学试题(1)三、填空题四、解答题C.D.10. 已知某正方体的体积为64,它的内切球的球面上有四个不同点,,,,且,则下列说法正确的是( )A .若,则直线与可能异面B .若,则直线与可能平行C.若,则平行直线与间距离的取值范围是D .若直线与相交,则四边形面积的取值范围是11. 已知圆台的上下底面的圆周都在半径为2的球面上,圆台的下底面过球心,上底面半径为,设圆台的体积为V ,则下列选项中说法正确的是( )A .当时,B .V 存在最大值C .当r 在区间内变化时,V 逐渐减小D .当r 在区间内变化时,V 先增大后减小12.如图,函数的图象与x 轴的其中两个交点为A ,B ,与y 轴交于点C ,D 为线段BC 的中点,,,,则()A.的最小正周期为B .的图象关于直线对称C .在单调递减D .为奇函数13.在四面体中,,,,,则四面体体积的最大值为__________.14.已知函数的最小正周期为,则当时函数的一个零点是___________________________.15.已知数列的前项和记作,,则________.16.已知函数,.(1)若在区间上单调递减,求实数a 的取值范围;(2)若,存在两个极值点,,证明:.17. 已知函数.(1)讨论函数的单调性;(2)若函数存在两个极值点,且恒成立,求实数k 的最小值.18. 某汽车公司最近研发了一款新能源汽车,并在出厂前对100辆汽车进行了单次最大续航里程的测试.现对测试数据进行分析,得到如图所示的频率分布直方图:(1)估计这100辆汽车的单次最大续航里程的平均值(同一组中的数据用该组区间的中点值代表);(2)经计算第(1)问中样本标准差的近似值为50,根据大量的测试数据,可以认为这款汽车的单次最大续航里程近似地服从正态分布(用样本平均数和标准差分别作为的近似值),现任取一辆汽车,求它的单次最大续航里程的概率;(参考数据:若随机变量,则,(3)某汽车销售公司为推广此款新能源汽车,现面向意向客户推出“玩游戏,送大奖”活动,客户可根据抛掷硬币的结果,操控微型遥控车在方格图上(方格图上依次标有数字0、1、2、3、……、20)移动,若遥控车最终停在“胜利大本营”(第19格),则可获得购车优惠券3万元;若遥控车最终停在“微笑大本营”(第20格),则没有任何优优惠券.已知硬币出现正、反面的概率都是,遥控车开始在第0格,客户每掷一次硬币,遥控车向前移动一次:若掷出正面,遥控车向前移动一格(从到;若掷出反面,遥控车向前移动两格(从到),直到遥控车移到“胜利大本营”或“微笑大本营”时,游戏结束.设遥控车移到第格的概率为,试证明是等比数列,并求参与游戏一次的顾客获得优惠券全额的期望值(精确到万元).19. 已知函数的图象是由函数的图象经如下变换得到:先将图象上所有点的纵坐标伸长到原来的倍(横坐标不变),再将所得到的图象向右平移个单位长度.x0y(1)求函数的解析式,并用“五点法”列表,作出该函数在上的图象;(2)已知关于x的方程在内恰有两个不同的解,.(i)求实数m的取值范围;(ii)证明:.20. 如图所示,用平面表示圆柱的轴截面,是圆柱底面的直径,为底面圆心,为母线的中点,已知为一条母线,且.(1)求证:平面平面;(2)求平面与平面夹角的余弦值.21. 在矩形中,,是边的中点,如图(1),将沿直线翻折到的位置,使,如图(2).(1)求证:平面平面;(2)已知,,分别是线段,,上的点,且,,平面,求直线与平面所成角的正弦值.。
2023-2024学年上海市七宝高中高考物理必刷试卷请考生注意:1.请用2B 铅笔将选择题答案涂填在答题纸相应位置上,请用0.5毫米及以上黑色字迹的钢笔或签字笔将主观题的答案写在答题纸相应的答题区内。
写在试题卷、草稿纸上均无效。
2.答题前,认真阅读答题纸上的《注意事项》,按规定答题。
一、单项选择题:本题共6小题,每小题4分,共24分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1、如图所示电路中,变压器为理想变压器,电压表和电流表均为理想电表,a 、b 接在电压有效值不变的交流电源两端,R 0为定值电阻,R 为滑动变阻器.现将变阻器的滑片从一个位置滑动到另一位置,观察到电流表A 1的示数增大了0.2A ,电流表A 2的示数增大了0.8A ,则下列说法中正确的是( )A .该变压器起升压作用B .电压表V 2示数增大C .电压表V 3示数减小D .变阻器滑片是沿d →c 的方向滑动2、如图所示是利用光电管产生光电流的电路是( )A .K 为光电管的阳极B .通过灵敏电流计G 的电流方向从b 到aC .若用黄光照射能产生光电流,则用红光照射也一定能产生光电流D .若用黄光照射能产生光电流,则用紫光照射也一定能产生光电流3、一个小球以一定的水平速度抛出,经过t 0时间,小球和抛出点的连线与水平方向夹角为37°,再经过t 时间,小球和抛出点的连线与水平方向的夹角为53°,不计空气阻力,下列说法正确的是A .0916t t =B .0716t t =C .079t t =D .01625t t = 4、2019年2月15日,一群中国学生拍摄的地月同框照,被外媒评价为迄今为止最好的地月合影之一。
如图所示,把地球和月球看做绕同一圆心做匀速圆周运动的双星系统,质量分别为M 、m ,相距为L ,周期为T ,若有间距也为L的双星P、Q,P、Q的质量分别为2M、2m,则()A.地、月运动的轨道半径之比为MmB.地、月运动的加速度之比为MmC.P运动的速率与地球的相等D.P、Q运动的周期均为2 2T5、如图所示,一根轻弹簧竖直直立在水平地面上,下端固定,在弹簧的正上方有一个物块。
2021年上海市七宝中学高三英语第二次联考试卷及答案解析第一部分阅读(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项AWelcome to join our Summer Youth Language Program to improve English language skills, make new friends worldwide. and have a good time here! The program capacity is limited, so if you are interested, you should register as soon as possible.Dates andCostsAll programs require a $ 100 nonrefundable deposit (不退还的押金)to reserve a spot in the program.June 15—July 16 5-week program:( $ 1920)July 20—August 20 5-week program:( $ 1920)June 15—August 20 10-week program:( $ 3620)You can also study with us for shorter periods. 4-week programs cost $ 1580 tuition and 3-week programs cost $ 1240.DiscountsThere is a 10% discount for each additional family member!Appropriate AgesRecommended Ages:14 and olderRestrictions:Students who are younger than 16 must have a parent or guardian with them.Program ScheduleIn the morning, you will join the all-aged Intensive English classes from 9:00 am to 2:00 pm, Monday to Thursday, where they can meet other students from worldwide. In the afternoonfrom 2 to 3 pm, we will have fun after-school activities, like soccer in the Park, visit toScienceMuseumand story writing competition.Items Students Should BringClothes:Shirts, a jacket, long pants ,a swimsuit and comfortable shoes, etc.Other personal items:Camera phone? plug adapter, photos of friends/family.Study materials:Notebooks, pens, and pencils.Airport Safe Items:Don't bring foods and snacks, or they'll be charged before you board the airport.1. How much will be charged if you and your brother join in a 3-week program?A. $ 1920,B. $ 2356.C. $3002.D. $ 3620.2. What will participants do at 2:30 pm on Monday?municate with foreign students.B. Attend intensive English classes.C. Join in some interesting activities.D. Talk with their parents on the phone.3. Why should students avoid bringing foods and snacks?A. To save space for their luggage.B. To protect the environment.C. To avoid any unwanted fees.D. To follow the rules of the airport.BA team of researchers from several institutions in the UK and one in Estonia has created a type of buoy(浮标)that has proven to be effective at frightening seabirds, thus preventing them from getting caught in gillnets—a type of vertical fishing net that is made of a material that makes it nearly invisible underwater.Every year, hundreds of thousands of seabirds die when they get caught in gillnets. Some estimates suggest that up to a half-million birds are caught in them each year. Over the years, researchers have created devices(装置)to prevent the birds from trying to catch fish near or in gillnets, but those didn't work well.To find a way that would work for all seabirds, the researchers first studied seabirds in a general sense, looking to find things that they would avoid. They noted that seabirds avoided eye contact with other creatures. Then the researchers came up with a simple idea—they put a small pole to a regular buoy and then attached a pair of googly eyes(金鱼眼)to the top of it. They made the eyes big enough so that even birds with poor eyesight, such as geese, would see them. Adding to the effectiveness of the device, waves made the eyes move back and forth. And the wind made the buoy spin very slowly, making sure that birds from every direction would get a good look at the eyes.To test their idea, the researchers selected several sites near gillnets and counted how many birds approached and how many attempted to catch fish near the nets. They then set up their googly-eyed buoys and once again counted birds. Over the course of 62 days, they found the number of birds that tried to catch fish near the gillnets dropped by approximately 25% for a distance of up to 50 meters. They also found that the birds were less likely to fish near where the buoys had been for up to three weeks after they had been removed.4. What is the function of paragraph 2?A. Introducing a new topic to discuss.B. Providing background information.C. Summarizing the previous paragraph.D. Pointing out the main idea of the text.5. Why did the researchers make the googly eyes big?A. To ensure all the seabirds can see them.B. To clearly observe seabirds' eye contact.C. To allow them to survive the strong wind.D. To effectively identify the right direction.6. What does the researchers' test result mainly suggest?A. The new device still needs improvingB. Gillnets are a death valley for seabirds.C. Seabirds hardly catch fish near the nets.D. The googly-eyed buoy proves effective.7. What is the text mainly about?A. A group of researchers interested in seabirds.B. A way to help seabirds catch fish effectively.C. A device keeping seabirds safe from gillnets.D. A googly-eyed buoy guiding seabirds to hunt.CKids often admire well-known celebrities, putting posters of their favorite musicians, movie stars and athletes on their bedroom walls. But rarely does a young person get to meet or talk to their idol. Yet for one young tennis player - Coco Gauff - her chance to do just that happened in an amazing way!Coco was born on March 13, 2004. At the age of 4, she developed an interest in tennis after watching Venus Williams win the Australian Open on TV. Coco began playing at 7 and showed a real talent for the sport. When young Coco turned 10, she began training at a tennis centre run by Venus's coach, Patrick Mouratoglou. He still remembers the first time he met Coco. He says, “She impressed me with her determination and fighting spirit. ” Convinced of her talent, Mouratoglou sponsored(资助)Coco to attend his academy in France. While she was preparing to go to the academy in 2019, she received a call that would change her plans and her life!Wimbledon(温布尔顿网球比赛)organizers called and offered Gauff entry to the tournament(联赛)as a wildcard(外卡选手).This madeher one of the youngest players to ever qualify. Before she knew it she was on her way to London. After arriving, she received another surprise. For her Wimbledon debut(首次登场),she would be playing her lifelong hero, Venus Williams! The tennis legend is 24years older than Gauff.The world watched with amazement as young Gauff beat Venus in two straight sets! Afterwards, Gauff shook Venus's hand, thanked her and said, “I wouldn't be here if it wasn't for you. " After the match, Venus said of Gauff, “I think the sky is the limit;it really is. " Venus said, “I feel honored that I was on her wall [as a poster] at some point in her life. Soon she will be on other girls' walls. It's nice because it will keep going from the next generation to the next generation. "8. What can we learn about Coco from the text?A. She took up tennis as career at the age of 4.B. She went to academy at the age of 7.C. She had played against William before 10.D. She beat William at the age of 159. Which of the following can best describe Coco?A. Talented and modest.B. Lucky and responsible.C. Proud and hard-working.D. Respectful and cheerful.10. What can we infer from Venus's words?A. Coco had reached her limits.B. Coco would rise to fame after the match.C. Coco's poster would be passed on.D. Coco had once visited her home.11. What can be a suitable title for the text ?A. Coco Gauff:Tennis's Next Superstar.B. Coco Gauff:A Poster on the Wall.C. What Posters Mean to a Young Girl.D. The Significance of Admiring an Idol.DScientists often compare coral reefs(珊瑚礁) to underwater rainforests, yet unlike the leafy plant base of a forest, corals are animals. The soft creatures are naturally half-transparent and get their brilliant color1 from algae(藻类) living inside them. When corals experience stress from hot temperatures or pollution, theyhaltthe interdependent relationship with algae, typically pushing them out and turning white. Corals are still alive when they are white, but they're at risk and many eventually die, turning dark brown.Scientists around the world are looking for means to protect and maybe increase corals. One common option is to create more protected areas — essentially national parks in the ocean. Beyond nature preserves, some conservationists are looking to more hands-on methods. One research center in the Florida Keys is exploring a form of natural selection to keep corals remaining. The reef system in the Keys has been hit hard by climate change and pollution, which is especially tough, because corals there help support fisheries worth $ 100 million every year.To keep the wild ecosystem alive, Erinn Muller, the center's director, and her team are harvesting samples of the corals that survived the environmental stress naturally, keeping them to make them reproduce, and then reattaching them to the reef. They have 46,000 corals on plastic frames under the sea. So far, the center has regrown over 70,000 corals from five different species on damaged reefs.In The Bahamas, Ross Cunning, a research biologist at Chicago's Shedd Aquarium, focuses on corals with genes that could make them natural candidates for restoration projects. He published a study of two Bahamian reefs, one that survived an extreme 2015 heat wave, and one that didn't. "We think their ability to deal with thesehigher temperatures is built into their genes," says Cunning. There's evidence of corals evolving more quickly to resist rapidly warming climate. The big question scientists need investigate, adds Gunning, is how much more heat corals can adapt to.12. What does the underlined word "halt" in the first paragraph mean?A. End.B. Develop.C. Strengthen.D. Weaken.13. What do Muller and her team do to save corals?A. Restore the damaged reefs.B. Grow corals by hand underwater.C. Create more protected areas.D. Move corals to unpolluted areas.14. What do Gunning's words suggest?A. Many corals have been genetically improved.B. Cooling down the waters is key to rescuing corals.C. Reasons for corals surviving heat waves are shocking.D. The highest temperature corals can survive is unclear.15. Which can be a suitable title for the text?A. Relationship between corals and algaeB. Efforts made to save coralsC. Impact of climate warming on coralsD. Survival crisis faced by coral reefs第二节(共5小题;每小题2分,满分10分)阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。
一、单选题二、多选题1. 下列选项中,p 是q 的必要不充分条件的是A .p:>b+d , q:>b 且c >dB .p:a >1,b>1, q:的图象不过第二象限C .p: x=1,q:D .p:a >1,q:在上为增函数2.等轴双曲线的右焦点为,方程的实根分别为和,则三边长分别为,,2的三角形中,长度为2的边的对角是A .锐角B .直角C .钝角D .不能确定3. 已知定义在R上的奇函数在上递增,则下列函数①;②;③;④;其中在上递减的是( )A .①②③B .③②C .②④D .②4. 在中,点是的三等分点,,过点的直线分别交直线于点,且,若的最小值为,则正数的值为( )A .1B .2C.D.5.已知全集,集合,,则( )A.B.C.D.6. 已知,则A.B.C.D.7. 已知函数的值域与函数的值域相同,则实数a 的取值范围为( )A.B.C.D.8. 已知函数的周期为,且满足,若函数在区间不单调,则的取值范围是( )A.B.C.D.9. 已知直线m ,n ,平面α,β,给出下列命题正确的是( )A .若m ⊥α,n ⊥β,且m ⊥n ,则α⊥βB .若m // α,n // β,且m // n ,则α // βC .若m ⊥α,n // β,且m ⊥n ,则α⊥βD .若m ⊥α,n // β,且m // n ,则α⊥β10. 某工厂有甲、乙两个车间生产同一种产品,其产量比为.从两个车间中各随机抽取了10个样品进行测量,其数据(单位:)如下:甲车间:乙车间:规定数据在之内的产品为合格品.若将频率作为概率,则以下结论正确的是( )A .甲车间样本数据的第40百分位数为9.8B .从样本数据看,甲车间的极差小于乙车间的极差C .从两个车间生产的产品任取一件,取到合格品的概率为0.84上海市七宝中学2022届高三高考冲刺模拟2数学试题上海市七宝中学2022届高三高考冲刺模拟2数学试题三、填空题四、解答题D .从两个车间生产的产品任取一件,若取到不合格品,则该产品出自甲车间的概率为0.411. 如图,正方体的棱长为3,点、、分别在棱、、上,满足,,记平面与平面的交线为,则()A .存在使得平面截正方体所得截面图形为四边形B.当时,三棱锥的外接球表面积为C.当时,三棱锥体积为D .当时;与平面所成的角的正弦值为12. 在棱长为2的正方体中,M为边的中点,下列结论正确的有( )A .与所成角的余弦值为B .过三点A 、M、的截面面积为C.四面体的内切球的表面积为D .E是边的中点,F是边的中点,过E 、M 、F 三点的截面是六边形.13. 满足条件的集合的个数是__.14.已知双曲线,若两条直线与该双曲线有四个交点,则称该双曲线为“和谐双曲线”,请写出一个以为焦点的“和谐双曲线”的方程:______.15.等差数列中,,是其前n 项和,则使取最大值的n 的值为______.16. 如图,有一块三棱锥形木块,各面均是锐角三角形,其中面内有一点.(1)若要在面内过点画一条线段,其中点在线段上,点在线段上,且满足与垂直,该如何求作?请在图中画出线段并说明画法,不必证明;(2)经测量,,,,,若恰为三角形的重心,为(1)中所求线段,求三棱锥的体积.17. 已知直三棱柱,各棱长均为,为的中点,为的中点.(1)求直三棱柱的体积;(2)求证:平面;(3)求异面直线与所成角的余弦值.18. 某中学为了提高学生学习数学的兴趣,举行了一次数学竞赛,共有600名学生参加了这次竞赛,为了了解本次竞赛的成绩情况,从中抽取了部分学生的成绩(得分为正整数,满分为150分),经统计,得到如图所示的频率分布表和频率分布直方图.组号分组频数频率140.1280.23x y480.2520.05620.05合计(1)求图中的x,a的值;(2)估计这600名学生竞赛的平均成绩(同一组中的数据用该组区间的中点值作代表,结果精确到整数).19. 已知函数和的定义域分别为和,若对任意的都存在个不同的实数,使得(其中),则称为的“重覆盖函数”.(1)试判断是否为的“2重覆盖函数”?请说明理由;(2)求证:是的“4重覆盖函数”;(3)若为的“2重覆盖函数”,求实数a的取值范围.20. 已知函数是定义在上的奇函数,当时,.(1)求的解析式;(2)若不等式对于任意恒成立,求实数的取值范围.21. 已知椭圆的左、右两焦点分别为,椭圆上有一点与两焦点的连线构成的中,满足(1)求椭圆的方程;(2)设点是椭圆上不同于椭圆顶点的三点,点与点关于原点对称,设直线的斜率分别为,且,求的值.。
2024届上海市七宝高中高考历史二模试卷注意事项1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。
第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
一、选择题:共30小题,每小题2.5分,共75分。
在每小题列出的四个选项中,只有一项是符合题目要求的。
1.诗人蔡显因写“夺朱非正色,异种也称王”诗句而遭到乾隆诛戮。
该事件反映的是A.八股取士B.文字狱C.文学革命D.白话文运动2.在雅典,公民大会发言时,说话者(讨论的双方)像面对法官那样面对听众,通过针锋相对的辩论、有力的证据、符合证明和证伪的模式、表达的艺术,最后由听众以举手表决的方式在辩论双方提出的观点之间做出选择。
一切观点、议案、决议、决定都必须通过论证的方法来证明自己的正确性。
这反映了A.雅典公民都具备较高的文化素质B.公民政治蕴含着一定的理性原则C.雅典城邦决策方式有很大随意性D.演说和辩论使城邦个人主义盛行3.下表为新中国成立初期我国重点建设城市非农业人口的变动情况表,根据表格可知,新中国初期A.建立国营经济促进了城市发展B.合理调整工商业推动人口迁移C.一五计划有利于平衡工业布局D.优先发展重工业改变工业结构4.毛泽东曾说:“对付蒋介石,就要像陕北农民赶着毛驴上山,前面要人牵,后面要人推,牵不走还得用鞭子抽两下,不然它就耍赖、捣乱。
”毛泽东这一说法A.进一步丰富了“工农武装割据”的理论B.使国共两党的党内合作得以基本实现C.有利于抗日民族统一战线的形成发展D.促成了新民主主义革命在全国的胜利5.“虽宣言变法,却专事练兵购械等项,不知本源,只变事不变法”评价的是A.洋务运动B.维新变法C.清末新政D.辛亥革命6.有人指出:“赫鲁晓夫不受教条束缚,在这个意义上他是个务实主义者;但奇怪的是,他是个不切实际的务实主义者……往往只凭心血来潮而不是深思熟虑。
2024届上海市七宝中学高考冲刺押题(最后一卷)生物试卷注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号。
回答非选择题时,将答案写在答题卡上,写在本试卷上无效。
3.考试结束后,将本试卷和答题卡一并交回。
一、选择题(本大题共7小题,每小题6分,共42分。
)1.薄荷中有一种叫薄荷醇的物质(其结构见图),这种物质可以刺激皮肤和口腔中的冷觉感受器PRPM8受体,让机体产生冷的感觉。
下列描述不合理的是A.涂抹薄荷后皮肤冷觉感受器受到刺激,产生的兴奋传到大脑皮层形成冷觉B.PRPM8受体存在于感觉神经元上,与薄荷醇结合后会产生电位变化C.吃薄荷后机体会出现汗腺分泌减少,皮肤毛细血管收缩等生理变化D.薄荷醇这种有机小分子的元素组成与ATP相同2.下列有关酒精作用的叙述错误的是()A.检测生物组织中脂肪的实验,酒精的作用是洗去花生子叶薄片上的浮色B.低温诱导植物染色体数目变化的实验,酒精的作用是漂洗被解离后的根尖C.绿叶中色素的提取和分离的实验,酒精的作用是提取绿叶中的色素D.探究土壤小动物类群丰富度的实验,酒精的作用是对小动物进行固定和防腐3.衰老人体通常会出现白发、老年斑、细胞数目减少等特征。
叙述正确的是()A.人体衰老是因为体内大多数细胞的基因发生突变B.老年人骨折后愈合得很慢,与成骨细胞的衰老有关C.细胞中的酪氨酸酶活性升高会导致老年人的头发变白D.老年斑的形成是因为黑色素随皮肤细胞衰老而逐渐积累4.在室温条件下,短时间内给健康大鼠静脉大量注射11℃、1.2%的NaCl溶液,可能会引起()A.红细胞形态发生皱缩B.尿量增加C.肾小管重吸收水能力增强D.汗腺分泌活动增强5.利用四组直立生长的幼苗,均给右侧单侧光进行向光性实验,结果如下图所示。
由此可证明的是()A.单侧光能引起生长素分布不均匀B.单侧光使幼苗背光侧细胞伸长得快C.苗尖端有感受单侧光刺激的作用D.苗尖端能产生化学物质并向下传递6.下图是某植物在晴天和阴天两种不同的环境条件下,净光合速率随时间变化的曲线,下列叙述正确的是A.由a~b段可以看出,此时限制叶片光合速率的主要环境因素是光照强度和CO2浓度B.在f~h对应时段,植物体内有机物总量的变化情况是先减少后增加C.h~i段的变化可能与植物体内脱落酸的含量增加有关D.j点时,叶肉细胞内光合速率等于呼吸速率7.人体肌肉由快缩肌纤维(细胞)和慢缩肌纤维(细胞)组成。
2022年上海市闵行区七宝中学高考数学二模试卷一、单选题:本题共4小题,每小题5分,共20分。
在每小题给出的选项中,只有一项是符合题目要求的。
1.设,则“”是“”的( )A. 充分而不必要条件B. 必要而不充分条件C. 充要条件D. 既不充分也不必要条件2.Logistic模型是常用数学模型之一,可应用于流行病学领域.有学者根据公布数据建立了某地区新冠肺炎累计确诊病例数的单位:天的Logistic模型:,其中K为最大确诊病例数.当时,标志着已初步遏制疫情,则约为参考数据( )A. 60B. 62C. 66D. 633.已知抛物线的焦点为F,过原点O的动直线l交抛物线于另一点P,交抛物线的准线于点Q,下列说法正确的是( )A. 若O为线段PQ中点,则B. 若,则C. 存在直线l,使得D. 面积的最小值为24.在平面直角坐标系中,函数的图象上有三个不同的点位于直线上,且这三点的横坐标之和为0,则这条直线必过定点( )A. B. C. D.二、填空题:本题共12小题,共54分。
5.已知集合,,则______.6.已知复数,其中i是虚数单位,则复数z在复平面上对应的点位于第______象限.7.若圆锥的底面半径为,高为6,则该圆锥的侧面积为______.8.展开式的二项式系数之和为32,则展开式中x的系数为______ 用数字填写答案9.实数a,b满足,则ab的最小值为______.10.设均为实数,若集合的所有非空真子集的元素之和为12,则______.11.已知函数,其中为常数,且有且仅有3个零点,则的最小值为______.12.2022年北京冬奥会吉祥物“冰墩墩”和冬残奥会吉祥物“雪容融”,有着可爱的外表和丰富的寓意,深受各国人民的喜爱.某商店有4个不同造型的“冰墩墩”吉祥物和3个不同造型的“雪容融”吉祥物展示在柜台上,要求“冰墩墩”和“雪容融”彼此间隔排列,则不同的排列方法种数为______用数字作答13.设AM为中BC边上的中线,且若,,则的最大值为______.14.已知定义在R上的奇函数满足,当时,,若对一切恒成立,则实数b的最大值为______.15.若抛物线与坐标轴分别交于三个不同的点A,B,C,则的外接圆恒过的定点坐标为______.16.已知函数,正数数列满足,若对任意正整数n,不等式都成立,则实数的最小值为______.三、解答题:本题共5小题,共76分。
2024届上海市崇明区高三下学期高考第二次模拟考试高效提分物理试题(基础必刷)学校:_______ 班级:__________姓名:_______ 考号:__________(满分:100分时间:75分钟)总分栏题号一二三四五六七总分得分评卷人得分一、单项选择题(本题包含8小题,每小题4分,共32分。
在每小题给出的四个选项中,只有一项是符合题目要求的)(共8题)第(1)题对静止在光滑水平面上的物体施加一水平拉力,在力刚开始作用的瞬间( )A.物体立即获得速度B.物体立即获得加速度C.物体同时获得速度和加速度D.由于物体未来得及运动,所以速度和加速度都为零第(2)题如图所示,电压互感器、电流互感器可看成理想变压器,已知电压互感器原、副线圈匝数比是1000:1,电流互感器原、副线圈匝数比是1:200,电压表读数是200V,电流表读数是1.5A,则交流电路输送电能的功率是( )A.3×102W B.6×104W C.3×105W D.6×107W第(3)题如图所示,真空中平行板电容器带有绝缘手柄的A板接地,闭合电键给电容器充电后断开电键。
电容器中的C点固定放置一带负电的点电荷q,q不影响电容器的电场分布。
下列说法正确的是( )A.若通过手柄把A板向上平移一小段距离,则q所受的电场力变大B.若通过手柄把A板向左平移一小段距离,则q所受电场力变小C.若紧靠B板插入一块有机玻璃板,则q的电势能变小D.若紧靠B板插入一块等大的铁板,则q的电势能不变第(4)题把重物压在纸带上,用一水平力缓缓拉动纸带,重物跟着纸带一起运动;若迅速拉动纸带,纸带就会从重物下抽出,这个现象的原因是( )A.在缓缓拉动纸带时,纸带给重物的摩擦力大B.在迅速拉动纸带时,纸带给重物的摩擦力小C.在缓缓拉动纸带时,纸带给重物的冲量大D.在迅速拉动纸带时,纸带给重物的冲量大第(5)题在体能测试跳绳时,质量为50kg的某同学一分钟跳了150次,若他每次跳起时,重心上升的高度约为5cm,则他一分钟内克服重力做功的大小约为( )A.2500J B.3570J C.7500J D.375000J第(6)题如图所示,10匝矩形金属线框在磁感应强度大小为的匀强磁场中绕垂直磁场的轴以角速度为匀速转动,线框电阻不计,面积为,线框通过滑环与一理想变压器的原线圈相连,副线圈接有两只灯泡和,且开关S断开时灯泡正常发光,理想变压器原、副线圈匝数比为,理想电流表示数为,则下列说法正确的是()A.灯泡的额定电压为B.灯泡的额定功率为C.若开关S闭合,电流表示数将增大D.若从图示位置开始计时,线框中感应电动势的瞬时值表达式为(V)第(7)题关于行星运动的规律,下列说法符合史实的是()A.开普勒在牛顿定律的基础上,导出了行星运动的规律B.开普勒在天文观测数据的基础上,总结出了行星运动的规律C.开普勒总结出了行星运动的规律,找出了行星按照这些规律运动的原因D.开普勒总结出了行星运动的规律,发现了万有引力定律第(8)题真空中有一点P与微粒Q,Q在运动中受到指向P且大小与离开P的位移成正比的回复力,则下列情况有可能发生的是()A.速度增大,加速度增大B.速度增大,加速度减小C.速度增大,加速度不变D.速度减小,加速度不变评卷人得分二、多项选择题(本题包含4小题,每小题4分,共16分。
上海市12校联考2024年高三下学期强化选填专练(二)数学试题注意事项:1.答题前,考生先将自己的姓名、准考证号码填写清楚,将条形码准确粘贴在条形码区域内。
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一、选择题:本题共12小题,每小题5分,共60分。
在每小题给出的四个选项中,只有一项是符合题目要求的。
1.半正多面体(semiregular solid ) 亦称“阿基米德多面体”,是由边数不全相同的正多边形为面的多面体,体现了数学的对称美.二十四等边体就是一种半正多面体,是由正方体切截而成的,它由八个正三角形和六个正方形为面的半正多面体.如图所示,图中网格是边长为1的正方形,粗线部分是某二十四等边体的三视图,则该几何体的体积为( )A .83B .4C .163D .2032.集合{2,1,1},{4,6,8},{|,,}A B M x x a b b B x B =--===+∈∈,则集合M 的真子集的个数是 A .1个B .3个C .4个D .7个3.设0.50.82a =,sin1b =,lg 3c =,则a ,b ,c 三数的大小关系是 A .a c b << B .a b c << C .c b a <<D .b c a <<4.一个几何体的三视图如图所示,则该几何体的体积为( )A .103B .3C .83D .735.3本不同的语文书,2本不同的数学书,从中任意取出2本,取出的书恰好都是数学书的概率是( ) A .12B .14C .15D .1106.若命题:从有2件正品和2件次品的产品中任选2件得到都是正品的概率为三分之一;命题:在边长为4的正方形内任取一点,则的概率为,则下列命题是真命题的是( )A .B .C .D .7.设过抛物线()220y px p =>上任意一点P (异于原点O )的直线与抛物线()280y px p =>交于,A B 两点,直线OP 与抛物线()280y px p =>的另一个交点为Q ,则ABQ ABOS S=( )A .1B .2C .3D .48. “哥德巴赫猜想”是近代三大数学难题之一,其内容是:一个大于2的偶数都可以写成两个质数(素数)之和,也就是我们所谓的“1+1”问题.它是1742年由数学家哥德巴赫提出的,我国数学家潘承洞、王元、陈景润等在哥德巴赫猜想的证明中做出相当好的成绩.若将6拆成两个正整数的和,则拆成的和式中,加数全部为质数的概率为( ) A .15B .13C .35D .239.由曲线3,y x y x ==围成的封闭图形的面积为( )A .512 B .13C .14D .1210.在ABC ∆中,H 为BC 上异于B ,C 的任一点,M 为AH 的中点,若AM AB AC λμ=+,则λμ+等于( )A .12B .23C .16 D .13 11.若01a b <<<,则b a , a b , log b a ,1log ab 的大小关系为( )A .1log log b ab aa b a b >>>B .1log log a bb ab a b a >>>C .1log log b ab aa ab b >>> D .1log log a bb aa b a b >>> 12.甲、乙、丙、丁四位同学利用暑假游玩某风景名胜大峡谷,四人各自去景区的百里绝壁、千丈瀑布、原始森林、远古村寨四大景点中的一个,每个景点去一人.已知:①甲不在远古村寨,也不在百里绝壁;②乙不在原始森林,也不在远古村寨;③“丙在远古村寨”是“甲在原始森林”的充分条件;④丁不在百里绝壁,也不在远古村寨.若以上语句都正确,则游玩千丈瀑布景点的同学是( ) A .甲B .乙C .丙D .丁二、填空题:本题共4小题,每小题5分,共20分。
七宝中学2024-2025学年高三上学期期中考试数学试题一、填空题(第1-6题每题4分,第7-12题每题5分,满分54分)1.函数的定义域为______.2.计算______.3.已知是1与9的等比中项,则正实数______.4.在的展开式中,的系数为______(用数字作答).5.在复平面内,复数对应的点位于第______象限。
6.已知,则______.7.已知集合,其中可以相同,用列举法表示集合中最小的4个元素所构成的集合为______.8.已知是函数的导函数,若函数的图象大致如图所示,则的极大值点为______(从中选择作答).9.已知函数.在中,,且,则______.10.如图,线段相交于,且长度构成集合,则的取值个数为______.11.抛物线的焦点为,准线为是拋物线上的两个动点,且满足.设线段y =(4log =a a =4(x -2x 2ii-π1sin 42θ⎛⎫+= ⎪⎝⎭πcos 4θ⎛⎫-= ⎪⎝⎭{}22,,A a a x y x y ==+∈N ,x y A ()f x '()f x ()f x y e '=()f x ,,,a b c d ()22cos 2xf x x =+ABC △()()f A f B =a b ≠C ∠=,AD BC O ,,,AB AD BC CD {}1,3,5,,90x ABO DCO ∠=∠=︒x 24y x =F ,,l A B π3AFB ∠=AB的中点在准线上的投影为,则的最大值是______.12.平面上到两个定点距离之比为常数的动点的轨迹为圆,且圆心在两定点所确定的直线上,结合以上知识,请尝试解决如下问题:已知满足,则的取值范围为______.二、选择题(本大题共4题,满分20分)13.已知是非零实数,则下列不等式中恒成立的是( )A .B .C .D14.已知直线,动直线,则下列结论正确的为()A .不存在,使得的倾斜角为B .对任意的与都不垂直C .存在,使得与重合D .对任意的与都有公共点15.一组学生站成一排.若任意相邻的3人中都至少有2名男生,且任意相邻的5人中都至多有3名男生,则这组学生人数的最大值是( )A .5B .6C .7D .816.若,有限数列的前项和为,且对一切都成立.给出下列两个命题:①存在,使得是等差数列;②对于任意的,都不是等比数列.则( )A .①是真命题,②是假命题B .①是假命题,②是真命题C .①②都是真命题D .①②都是假命题三、解答题(本大题共有5题,满分76分)17.如图,为正方体,动点在对角线上(不包含端点),记.M l N MNAB(0,1)λλλ>≠,,a b c 1,2,1a c b a b ===⋅=1122c a c b ++-a 1a a>2211a a a a+≥+12a a+>-≥-1:10l x y --=()()2:10l k x ky k k +-+=∈R k 2l π21,k l 2l k 1l 2l 1,k l 2l 3n ≥12,,,n a a a k k S 1k k S S +>11k n ≤≤-3n ≥12,,,n a a a 3n ≥12,,,n a a a 1111ABCD A B C D -P 1BD 11D PD Bλ=(1)求证:;(2)若异面直线与所成角为,求的值.18.已知点是坐标原点.(1)若,求的值:(2)若实数满足,求的最大值.19.英语学习中学生喜爱用背单词"神器"提升自己的英文水平,为了解上海中学生和大学生对背单词“神器”的使用情况,随机抽取了200名中学生和80名大学生,统计他们最喜爱使用的一款背单词“神器”,结果如下:百词斩扇贝单词秒词邦沪江开心词场中学生80604020大学生30202010假设大学生和中学生对背单词“神器”的喜爱互不影响.(1)从该地区的中学生和大学生中各随机抽取1人,用频率估计概率,试估计这2人都最喜爱使用“百词斩”的概率;(2)采用分层抽样的方式先从样本中的大学生中随机抽取8人,再从这8人中随机抽取3人.记X 为这3人中最喜爱使用“扇贝单词”的人数,求X 的分布列和数学期望;(3)记样本中的中学生最喜爱使用这四款背单词“神器”的频率依次为,其方差为;样本中的大学生最喜爱使用这四款背单词“神器”的频率依次为,其方差为的方差为.写出的大小关系.(结论不要求证明)20.在平面直角坐标系中,分别是椭圆的左右焦点,设不经过的直线与椭圆交于两个不同的点,焦点到直线的距离为.(1)求该粗圆的离心率;(2)若直线经过坐标原点,求面积的最大值;(3)如果直线的斜率依次成等差数列,求的取值范围.21.若斜率为的两条平行直线,曲线满足以下两条性质:(Ⅰ)分别与曲线至少有两个切点;(Ⅱ)曲线上的所有点都在之间或两条直线上.则称直线为曲线的一对“双夹线”,把“双夹线”之间的距离称为曲线在“方向上的宽度”,记为.已知曲线1AP B C ⊥AP 11D B π3λ()())1,1,1,1,,A B CO θθ-BC BA -=sin2θ,m n π,0,2mOA nOB OC θ⎛⎫+=∈ ⎪⎝⎭22(3)m n ++1234,,,x x x x 21s 1234,,,y y y y 2212341234;,,,,,,,s x x x x y y y y 23s 222123,,s s s 12,F F 22143x y +=1F l ,A B 2F l d l 2F AB △11,,AF l BF d k 12,l l ():C y f x =12,l l C C 12,l l 12,l l C C k ()d k.(1)判断时,曲线是否存在“双夹线”,并说明理由;(2)若,试问:和是否是函数的一对“双夹线”?若是,求此时的值;若不是,请说明理由.(3)对于任意的正实数,函数是否都存在"双夹线"?若是,求的所有取值构成的集合;若不是,请说明理由.2025届七宝中学高三(上)期中考试参考答案一、填空题1、; 2、; 3、3; 4.18; 5、四;6.;7、; 8、a ; 9、;10、4;11、1; 12、10、【答案】412、【答案】二、选择题13~16、BDBC三、解答题17、(1)证明:如图,连接.由已知可得,平面平面,所以,又是正方形,所以,又平面平面,所以平面,又动点在对角线上,所以平面,所以平面,所以.():sin C f x mx n x =+0,1m n ==C 1,1m n ==-1:1l y x =+2:1l y x =-()y f x =()d k ,m n ()y f x =()d k ()1,+∞3412{}0,1,2,4π311,BC AD AB ⊥111,BCC B B C ⊂11BCC B 1AB B C ⊥11BCC B 11B C BC ⊥1BC ⊂11,ABC D AB ⊂111,ABC D AB BC B = 1B C ⊥11ABC D P 1BD P ∈11ABC D AP ⊂11ABC D 1AP B C ⊥(2)以点为坐标原点,分别以所在的直线为轴,如图建立空间直角坐标系,设,则,则.由已知,可得,设点,则,所以,所以,即,所以,.又异面直线与所成角为,所以,即,解得或0,因为,所以满足条件.18、【答案】(1); (2)16.19、【答案】(1); (2); (3)20.【答案】(1); (2 (3).21、【答案】(1)存在;(2)是,3)是,C 1CD CB CC 、、x y z 、、1CD =()()()()()()()1110,0,0,1,0,0,0,1,0,0,0,1,1,0,1,0,1,1,1,1,0C D B C D B A ()11111,1,0,D B D B =-=11D PD Bλ=11D P D B λ= ()000,,P x y z ()10001,,1D P x y z =-- 00011x y z λλλ-=-⎧⎪=⎨⎪-=-⎩00011x y z λλλ=-+⎧⎪=⎨⎪=-+⎩()1,,1P λλλ-+-+(),1,1AP λλλ=---+AP ==AP 11D B π311π1cos ,cos 42AP D B 〈==〉 11cos ,2AP D 1λ=01λ<<45λ=12-320[]34E X =222231s s s <<12()d k =()0)d k n =>。
上海高考专题训练-六选四强化篇-第2次专练(Ⅰ)Having a happier life is something we all always struggle for.One of the key foundations of that is to be consistent in doing things that bring happiness.1_____________Consider these4 habits:ugh in the middle of a busy day.It’s3pm on a Sunday afternoon and you’re desperate to leave,for school.On top of the homework,you’re running close to super important deadline.2_____________Just take a moment to laugh.You should laugh more often,especially on a busy day.2.Do not compare yourself to others.Measure your own successes based on your progress and only yours.All of our lives are unique.No one is better than anyone else.3.Find time to work out regularly and eat well.Exercise can produce tons of feel-good hormones(荷尔蒙).3_____________Feeding your body with whole and nutritious foods,on the other hand,can positively affect your body in both short and long term.Find time to schedule in a workout even if it’s only thirty minutes and do something you love.Eat well because foods can help you stay focused and more energized,and happier as a whole.4.End each day with gratitude.4_____________It might be something as small as a child’s laugh or something as huge as a praise from the headmaster.Whatever it is,be grateful for that day because it will never come again.A.Surround you with people who matter.B.Don’t blame everything not going your way.C.Try to think you are better than anyone else.D.Develop right habits to ensure we live a happy life.E.These hormones can help avoid stress and depression.F.Just before you go to bed,write down at least one wonderful thing that happened.参考答案:DBEF(Ⅱ)To be confidentConfidence of success is almost success.Here’s how to believe in yourself.but nearly every person has struggled with his or her self-confidence at one point.1._____________Accept compliment(恭维;敬意)politely.When someone compliments you,make eye contact,smile,and say“thank you”.It shows that you’re polite and have a secure sense of self-worth.If you’re still uncomfortable taking compliments,try giving one back after you’ve accepted one.This can help you feel like the score is“even”and you haven’t been too prideful.2._____________That’s a simple and an effective psychological technique to become confident.When you are talking louder you are sending the signal that you are confident,and as you make it as a habit you will feel more confident.But don’t be dominating(专横的).Look the part.Or,as the saying goes,“Fake it till you make it.” 3. _____________Devote a little time each day to make sure you’representing yourself well. Keep your shoulders back,walk with purpose instead of dragging your feet,and sit up straight. Smile and make eye contact.It’s a small change,but it can work wonders on what other people think of you.Develop your interests.If there’s a sport or hobby you’ve always wanted to be good at, now’s the time!Improving your skills will show that you are talented,and make you confident. Learn a musical instrument or a foreign language;take up an art form like painting----whatever it is that catches your interest.4._____________Remember that learning is a process,and you’re in it for the small victories and the relaxing time,not to be the best ever.A.Make a list.B.You’re not alone!C.Talk a little louder.D.Stop comparing yourself with everyone else.E.Don’t get discouraged if you’re not immediately awesome.F.If you know that you look like a confident person,eventually you’ll start to feel it,too.参考答案:BCFE(Ⅲ)We spend so much time waiting to be loved,hoping love will find us,and looking for that special love.Unfortunately,that’s not usually how life works.To be loved,you should love and respect yourself as much as you do others.In order to love someone,you should love yourself.●Stop comparing yourself to others.1_____________We all have different gifts.When you compare yourself to others for what they have,whether it is a car,a house,or a job,it makes you feel bad about yourself.Really be grateful about everything you have.Gratitude keeps your heart open to love.●Practice receiving love.To truly love is to be able to receive it.When someone loves you, does some kind deeds to you,or says kind words,accept it2._____________.Know that you are worthy of love.It is important to accept a gift of love by others.You give yourself a chance to learn more about yourself that you are lovable.You give someone a joy of giving by loving you.●3._____________.Write about your experiences,good and bad.When you write down good experiences,allow yourself to feel those feelings.When you remember bad experiences, allow yourself to feel passion is not self-pity,but rather willingness to accept one's own pain and regret.●Stop trying to be perfect.Stop blaming yourself for being less than perfect.4_____________Just follow all the steps above and don't let anyone's expectations of you put any pressure on you.A.Keep a diary.B.Appreciate yourself.C.Do not feel sorry about it.D.Always do your best,but not reaching perfection is NOT failure.E.Allow yourself to feel the love that has come your way.F.Everyone on the earth is unique.参考答案:FEAD(Ⅳ)Roger Sperry and Robert Ornstein of the California Institute of Technology,Nobel prize winners,discovered that the human brain has two sides,and each side has different work to do. The left side of the brain controls language and number and it analyses and reasons.The right side controls our imagination and our understanding of space.It controls our appreciation of music and our sense of rhythm.It is also the right side of our brain which daydreams.Leonardo da Vinci was the great painter and sculptor.He was also an architect,a scientistand an inventor!1._____When he invented machines he used both his imaginative ability and his analytical ability.2.____Albert Einstein enjoyed art,playing the violin and sailing.Indeed,Einstein said his scientific discoveries grew from his imagination rather than from analysis,reason and language. He said that written and spoken words were not important in his thinking.The story goes that Einstein was daydreaming one summer's day while sitting on a hill.He imagined that he was riding on sunbeams to the far distance of the universe.Then he found that he had returned to the sun.So he realized that the universe must curve(弯曲).3.____He then used the left side of his brain to apply analysis,number and reason.And finally he used language to explain it.Traditional education in schools encourages us to use the left side of our nguage, number,analysis and reason are given more importance in our schools than imagination and daydreaming.Why don't we give more value to visual thinking?Why jump on one foot if we have two perfectly good legs!4.____We need to use our imagination to think of solutions to problems and to enjoy emotional and artistic experiences.And we need to be logical able to analyze and organize in order to survive day by day.A.We benefit by thinking creatively.B.We all need both sides of our brain.C.He got this idea by using his imagination.D.Great scientists and great artists are similar.E.He was considered crazy for his strange ideas.F.He used both sides of his brain within each activity.参考答案:FDCB(Ⅴ)No matter how old you are,your mom will always remain as one of the most important people in your life.Maybe you don't know how to express your appreciation and love to her on an ordinary day. 1._____________Here are several things we can do this Mother's Day to show how much we appreciate and care for our mothers.Give her flowers. 2._____________You can show your love to your mom by giving her flowers that match her personality.Or,if you do not know your mom's favorite,carnations(康乃馨)could be your best choice.Cook for her.Mothers usually are the ones who cook for us.Your mom will absolutely love it if you surprise her by taking over the kitchen and cooking something for her.Just make sure you clean up afterwards.3._____________You can just do so describing how much your mother means to you.It can be very effective that your mom will keep them and always be reminded of how important she is to your lives as a family member.Travel with her.Mothers work hard,so traveling can help her to relax and forget her problems. She will treasure the moment—wherever you go,just your presence. 4._____________ Take her to a spa.Massages or spas(按摩保健)are for moms of all ages,and she will enjoy breaking the boredom of staying indoors the whole day.And this will offer your mom comfort and an increased sense of well-being.Mother's Day is coming.It is a time to let Mom know she's special to you.A.Write her a letter.B.Remember her wedding anniversary.C.A lot of us forget that the best gift to give her is ourselves.D.Almost every girl appreciates flowers and so does your mother.E.She remains the center of attention and respect for a child for a long time.F.However,Mother's Day is the special time when you can let her know how important she is to you.参考答案:FDAC(Ⅵ)When we’re young children,many of us seem to have little trouble making new friends. 1._____________.As adults,we tend to become more guarded with new people and have less time to devote to friendships.Consequently,most of us find it much harder to make new friends.If you’ve never experienced a close friendship,even as a child,you may find it even harder.But we all need and want good friends,even those of us who may sometimes pretend otherwise.The need for friends is instinctual(本能的).Our survival used to depend on having friends to hunt and find food with,to help us build shelter and keep our families safe. 2. _____________They add meaning to life.They help you enjoy the good times and overcome the difficult ones.While strong relationships with friends can be a huge source of fun and pleasure,they are also important for your physical and emotional health.Good friends can:●3_____________Even if it’s just having someone to share your problems with,friends can help you cope with serious illness,the loss of a job or loved one,the breakup of a relationship,or any other challenge in life.●Help you to reach your goals.Whether you’re trying to get fit,give up smoking,or otherwise improve your life, encouragement from a friend can really boost your willpower.4._____________●Improve your mood.Happiness can be infectious.Spending time with positive friends can be happy.●Reduce stress and depression.Having an active social life can benefit your immune system and help reduce isolation,a major factor for depression.A.Friendships take time to form and even more time to deepen.B.Provide support when you're going through tough times.C.But as we age,friendships grow and develop differently.D.Yet they are less important nowadays.E.It also increases your chances of success.F.Today,good friends are just as important.参考答案:CFBE(Ⅶ)Are you new to experiencing relationships?Well,let me give you advice on having a healthy and possibly long-term relationship.Be an honest person with them.Do not hide things from them,do not lie.Don't be afraid to say things that isn't very flattering about yourself.Getting them to trust you is the most important element in any relationship.If there's no trust,there's nothing there.So please be honest and they'll learn to.open up to you.Make sure you give them respect.Now respect isn't just simply treating her or him nicely. There's a lot more to it.You have to learn to adjust to their liking.1._____________Don't justthink about yourself,think about what your partner needs out of it as well.2._____________Always be willing to help them and give them honesty and positivity at the same time.Make them feel you are someone they can really count on and build a future with. This is an important step in a relationship.Your partner has to be able to count on you when needed.Make sure you have a good sense of humor with ughter is the key to happiness. Laugh a lot with them,joke with ughter may seem silly,but it's the secret to a lot in life. It will keep the sparks alive.3._____________Make sure the communication is good.This goes along with trust,but always communicate how you feel,even if it's something that upsets you.Instead of screaming,talk to them.4. _____________It's important to communicate this to them,not keep it bottled up. A.Show them your personality.B.Make sure you are encouraging to your partner.C.Laughter keeps the relationship strong and lasting.D.Don't start to neglect them and make them feel unwanted.E.Basically,learn to study your partners'moods,wants.and needs.F.If they did something that made you unhappy,tell them about it in a respectful manner.参考答案:EBCF。