辽宁省大连市旅顺口区2020届高三上学期期中考试答案
2019-2020学年辽宁省大连市旅顺口区高三(上)期中化学试卷 (含答案解析)
2019-2020学年辽宁省大连市旅顺口区高三（上）期中化学试卷一、单选题（本大题共20小题，共60.0分）1.下列说法不正确的是()A. 图Ⅰ所示装置可制备氢氧化亚铁B. 图Ⅱ所示装置可电解制氯气和氢气C. 图Ⅲ所示装置可验证氨气在水中的溶解性D. 图Ⅳ所示装置和操作可从苯酚中分离出苯2.下列化学用语中正确的是()A. 钠离子的电子式：B. Cl−的结构示意图：C. 质量数为35的核素氯： 3517ClD. NaCl的形成过程：3.用N A表示阿伏加德罗常数的值。
下列叙述正确的是()A. 32gS8单质(结构如图)中含有的S−S键个数为2N AB. 18gD2O中含有的原子数为3N AC. 标准状况下，22.4LCHCl3中所含分子数为N AD. 17g羟基(−OH)所含电子总数为9N A4.物质分类在逻辑上存在如下关系：下列说法正确的是()A. 碳酸盐与钠盐属于包含关系B. 化合物与氧化物属于交叉关系C. 分散系与胶体属于包含关系D. 混合物与空气属于并列关系5.下列各组离子一定能大量共存的是()A. 在无色溶液中：NH4+、Fe2+、SO42−、CO32−B. 在含大量Ba2+的溶液中：NH4+、Na+、Cl−、OH−C. 在强碱性溶液中：Na+、K+、SO42−、HCO3−D. 在强酸性溶液中：K+、Fe2+、Cl−、SO42−6.下列事实不能用元素周期律解释的是()A. 碱性：NaOH>Al(OH)3B. 相对原子质量：Ar>KC. 酸性：HClO4>HIO4D. 稳定性：H2O>H2S7.下列反应的离子方程式正确的是()A. 向明矾溶液中加入足量的烧碱溶液：Al3++3OH−=Al(OH)3↓B. 在含有等物质的量的Fe(NO3)2和KI组成的混合溶液中滴入稀盐酸：3Fe2++4H++NO3−=3Fe3++NO↑+2H2OC. 碳酸氢铵溶液中滴加足量的NaOH溶液：HCO3−+OH−=CO32−+H2OD. 纯碱溶液呈碱性的原因：CO32−+H2O⇌HCO3−+OH−8.某有机物X的结构简式如下图所示，则下列有关说法中正确的是()A. 有机物X的含氧官能团有3种B. X分子中苯环上的一氯取代物有3种C. 在Ni作催化剂的条件下，1mol X最多能与5molH2加成D. X在一定条件下能发生加成、取代、消去等反应9.某溶液中含有大量的、Cl−、Ca2+，在该溶液中还可能大量存在的离子是A. B. OH− C. Al3+ D. Ag+10.Fe2O3在工业上有重要的用途，可发生如图所示的一系列反应．下列说法正确的是()A. Fe2O3与Al的反应属于吸热反应B. Fe2O3与NaN3反应，每消耗1molFe2O3产生9molN2C. Fe2O3与CO的反应属于置换反应D. 常温下K2FeO4在水中的溶解度比Na2FeO4的大11.分子式为C3H7OCl，且分子中含有羟基的同分异构体的数目为(不考虑立体异构)()A. 3B. 4C. 5D. 612.下列图象不正确的是()A. 向100mL 0.1mol⋅L−1H2SO4溶液中滴加0.1mol⋅L−1Ba(OH)2溶液至过量B. 向100mL 0.1mol⋅L−1H2SO4溶液中加入NaOH固体C. 向一定浓度的氯化钠溶液中加水D. 向蒸馏水中通入HCl 气体13. 高铁电池是一种新型可充电电池，与普通高能电池相比，该电池能长时间保持稳定的放电电压．高铁电池的总反应为3Zn +2K 2FeO 4+8H 2O ⇌充电放电3Zn(OH)2+2Fe(OH)3+4KOH 下列叙述不正确的是( )A. 放电时负极反应式为Zn −2e −+2OH −=Zn(OH)2B. 放电时正极反应式为FeO 42−+4H 2O +3e −=Fe(OH)3+5OH −C. 放电时每转移3mol 电子，正极有1molK 2FeO 4被氧化D. 放电时K +向正极移动，且正极附近溶液的碱性增强14. 已知：①2C(s)+O 2(g)===2CO(g) ΔH 1；②2CO(g)+O 2(g)===2CO 2(g) ΔH 2。
辽宁省大连市2024-2025学年高三上学期期中Ⅰ考试 数学含答案
2024-2025学年度上学期高三年级期中I 考试数学科试卷（答案在最后）命题人：第I 卷一、单选题：本大题共8小题，每小题5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.已知i 是虚数单位，复数1z 、2z在复平面内对应的点分别为()1,2-、()1,1-，则复数21z z 的共轭复数的虚部为()A.15-B.15C.1i5- D.1i 52.等比数列{}n a 的公比为q ，前n 项和为n S ，则以下结论正确的是（）A.“q >0”是“{}n a 为递增数列”的充分不必要条件B.“q >1”是“{}n a 为递增数列”的充分不必要条件C.“q >0”是“{}n a 为递增数列”的必要不充分条件D.“q >1”是“{}n a 为递增数列”的必要不充分条件3.函数()()e 1sin e 1xxx f x -=+，则=的部分图象大致形状是（）A.B.C. D.4.某制药企业为了响应并落实国家污水减排政策，加装了污水过滤排放设备，在过滤过程中，污染物含量M （单位：mg /L ）与时间t （单位：h ）之间的关系为：0ektM M -=（其中0M ，k 是正常数）．已知经过1h ，设备可以过速掉20%的污染物，则过滤一半的污染物需要的时间最接近（）（参考数据：lg 20.3010=）A.3hB.4hC.5hD.6h5.若ππcos ,,tan 223sin αααα⎛⎫∈-= ⎪-⎝⎭，则πsin 23α⎛⎫-= ⎪⎝⎭（）A.718+-B.718- C.18-D.18-6.已知ABC V 是边长为点P 是ABC V 所在平面内的一点，且满足3AP BP CP ++=，则AP的最小值是（）A.1B.2C.3D.837.已知4ln 3a π=，3ln 4b π=，34ln c π=，则a ，b ，c 的大小关系是A.c b a << B.b c a << C.b a c << D.a b c<<8.设函数()32||()e 1x f x x x=+-（44x -<<），若(21)(2)(12)f x f f x ++<-，则x 的取值范围是（）A.31,22⎛⎫-- ⎪⎝⎭ B.31,22⎛⎫-⎪⎝⎭ C.1,2⎛⎫-∞-⎪⎝⎭D.3,2⎛⎫-+∞ ⎪⎝⎭二、多选题：本题共3小题，每小题6分，共18分.在每小题给出的选项中，有多项符合题目要求.全部选对得6分，部分选对的得部分分，有选错的得0分.9.已知220,0,1a b a b ab >>+-=，下列不等式恒成立的是（）A.112a b+≥ B.2a b +≥ C.332a b +≤ D.0323b <≤10.已知函数()()πsin 0,04f x A x B A ωω⎛⎫=++>> ⎪⎝⎭（）A.若()f x 在区间π3π,44⎡⎤⎢⎥⎣⎦上单调，则0ω<≤B.将函数()y f x =的图像向左平移π2个单位得到曲线C ，若曲线C 对应的函数为偶函数，则ω的最小值为13C.若函数()y f x =在区间()0,π上恰有三个极值点，则91344ω<≤ D.关于x 的方程()22f x A B=+在()0,π上有两个不同的解，则522ω<≤11.已知()f x 是定义在R 上连续的奇函数，其导函数为()g x ，()()424f x f x =-，当[]2,1x ∈--时，()0g x '>，则（）A.()g x 为偶函数B.()f x 的图象关于直线12x =对称C.4为()g x 的周期D.()g x 在2026x =处取得极小值第II 卷三、填空题：本题共3小题，每小题5分.12.已知向量()1,2a =-，()1,b λ= ，若a 与b 的夹角为锐角，则实数λ的取值范围是________.13.设实数x 、y 、z 、t 满足不等式1100x y z t ≤≤≤≤≤，则x zy t+的最小值为______.14.若存在正实数x ，使得不等式()2ln 2ln 00axa x a ⋅⋅-≤>成立，则a 的最大值为______．四、解答题：解答应写出文字说明、证明过程或演算步骤.15.已知ABC V 的内角A ，B ，C 的对边分别为a ，b ，c ，5c 5c s os o a CA cb -=.（1）求c ；（2）若7b =，π3B =，点M 在线段BC 上，5AM =，求MAC ∠的余弦值.16.已知函数()()212ln 0af x x a x=-->．（1）当4a =时，求函数()f x 在点()()1,1f 处的切线方程；（2）设函数()f x 的极大值为()M a ，求证：()11M a a+≤．17.已知函数()()2ln 2f x x a x a x =+-+，()ln 1g x x x x a =--+，a ∈R .（1）讨论()f x 的单调性；（2）若()()1ln f x g x a x +≥+对任意1x ≥恒成立，求实数a 的取值范围.18.已知数列{}n a 满足递推关系，()2*1231n n n n a a ma n N a +++=∈+，又1=1a .（1）当1m =时，求数列{}n a 的通项公式；（2）若数列{}n a 满足不等式1n n a a +≥恒成立，求m 的取值范围；（3）当31m -≤<时，证明12111111112nn a a a +++≥-+++ .19.对于数列{}n a ，如果存在等差数列{}n b 和等比数列{}n c ，使得()n n n a b c n *=+∈N ，则称数列{}na 是“优分解”的．（1）证明：如果{}n a 是等差数列，则{}n a 是“优分解”的．（2）记()2*11ΔΔΔΔn n n n n n a a a a a a n ++=-=-∈N，，证明：如果数列{}na 是“优分解”的，则()2*Δ0n a n =∈N 或数列{}2Δn a 是等比数列．（3）设数列{}n a 的前n 项和为n S ，如果{}n a 和{}n S 都是“优分解”的，并且123346a a a ===，，，求{}n a 的通项公式．2024-2025学年度上学期高三年级期中I考试数学科试卷命题人：第I卷一、单选题：本大题共8小题，每小题5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题答案】【答案】A【2题答案】【答案】C【3题答案】【答案】A【4题答案】【答案】A【5题答案】【答案】D【6题答案】【答案】C【7题答案】【答案】B【8题答案】【答案】A二、多选题：本题共3小题，每小题6分，共18分.在每小题给出的选项中，有多项符合题目要求.全部选对得6分，部分选对的得部分分，有选错的得0分.【9题答案】【答案】ACD【10题答案】【答案】CD【11题答案】【答案】ACD第II卷三、填空题：本题共3小题，每小题5分.【12题答案】【答案】1(,2)(2,)2∞--⋃-【13题答案】【答案】15##0.2【14题答案】【答案】1e ln 2四、解答题：解答应写出文字说明、证明过程或演算步骤.【15题答案】【答案】（1）5；（2）1314.【16题答案】【答案】（1）690x y --=（2）证明见解析【17题答案】【答案】（1）答案见解析；（2）(,0]-∞.【18题答案】【答案】（1）21nn a =-；（2）3m ≥-；（3）证明见解析.【19题答案】【答案】（1）证明见解析（2）证明见解析（3）122n n a -=+。
大连市旅顺口区2020届高三化学上学期期中卷附答案详析
大连市旅顺口区2020届高三化学上学期期中卷本卷满分100分；答题时间90分钟。
可能用到的相对原子质量：O 16 Na 23 Cl 35.5 Fe 56 K39 Mn55第Ⅰ卷（选择题共60分）本卷选择题共20小题，每小题3分，共60分，每小题只有一个选项符合题意。
1．化学深入我们生活，下列说法不正确的是（）A．食盐可做食物调味剂，也可做食品防腐剂B．高锰酸钾溶液、酒精、双氧水都能杀菌消毒，都利用了强氧化性C．在食品袋中放入盛有硅胶和铁粉的透气小袋，可防止食物受潮、氧化变质D．用浸泡过高锰酸钾溶液的硅藻土吸收水果中的乙烯，可以实现水果保鲜的目的2．下列化学用语正确的是（）A．丙烯的实验式：C3H6B．CO2的电子式：C．镁离子的结构示意图：ClD．中子数为18的氯原子符号：18173．用N A表示阿伏伽德罗常数的值，下列叙述正确的是（）A．标准状况下，33.6LHF中含有氟原子的数目为1.5N AB．16 g O3和O2混合物中氧原子数为N AC．1mol的羟基与1mol的氢氧根离子所含的电子数均为9N AD．标准状况下，0.1mol Cl2溶于水，转移电子数为0.1N A4．下列有关分类的说法正确的是（）A．胶体的本质特征是具有丁达尔效应B．阳离子、阴离子中均分别只含有一种元素，则由这样的阴、阳离子组成的物质一定是纯净物C．白磷转化为红磷是物理变化D．碱性氧化物一定是金属氧化物，酸性氧化物不一定是非金属氧化物5．在室温下，下列各组离子一定能大量共存的是（）A．滴入石蕊试液显红色的溶液：K+、Mg2+、AlO2−、SO32−B．1.0 mol·L−1的KNO3溶液：H+、Fe2+、Cl−、SO42−C．在c(OH－)/c(H＋)＝1×1012的溶液中：NH4+、Fe2+、Cl－、NO3−D．通入足量CO2的溶液：Ca2+、Cl−、K+、Na+6．下列事实不能用元素周期律解释的是（）A．气态氢化物的稳定性：HBr > HIB．0.1 mol·L－1溶液的pH：NaOH > LiOHC．向Na2SO3溶液中加盐酸，有气泡产生D．Mg、Al与同浓度盐酸反应，Mg更剧烈7. 下列离子方程式正确的是（）A．等体积、等浓度的Ba(OH)2稀溶液与NH4HCO3稀溶液混合：Ba2++2OH−+ NH 4++HCO3−BaCO3↓+NH3·H2O+H2OB．将磁性氧化铁溶于盐酸：Fe 3O4+8H+3Fe3++4H2OC．用铁电极电解氯化钠溶液：2Cl−+2H2O2OH−+H2↑+Cl2↑D．将SO 2通入Ca(ClO)2溶液中：Ca2++2ClO−+SO2+H2O CaSO3↓+2HClO8. 有机物的结构可用“键线式”表示，如CH 3—CH CH—CH3可简写为，有机物X的键线式为。
2020-2021学年大连市旅顺实验中学高三英语上学期期中试卷及参考答案
2020-2021学年大连市旅顺实验中学高三英语上学期期中试卷及参考答案第一部分阅读（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AWhen the weather is bad or when the flu breaks out, we can let the kids do some fun things at home, which can be beneficial to kids.Reading out loudIf your children are young enough, don't forget to read books to them out loud! Few children dislikehaving a good book read to them, and it's great for the development of their brains. However, if your children are a bit older and have moved onto more advanced books, there is always the choice of listening to an audiobook. This can also be done while they're doing something else.Playing board gamesMaybe your children's table is full of board games, which have been forgotten for a long time. It's a good time to bring them out when playing outside is no longer a choice. Surely, playing board games is a great way to connect with children. In addition, many board games are designed to get children thinking!Having a dance partyConsidering that all you need is a speaker or maybe just a phone, you can have a dance party wherever you are! This is a great way to get kids’ bodies moving when they are inside. Play some of your children's favorite music and let them dance to it. Not only is it good exercise, but it will help your children feel time is flying!Doing jigsaw (拼图) puzzlesFor most people that have children, it's common to have at least one jigsaw puzzle at home. Jigsaw puzzles are great because everyone can do them on their own time. Besides, your whole family will have a sense of achievement when everyone is smiling over the finished product.1. What do reading out loud and playing board games have in common?A. They both develop children's team spirit.B. They both improve children's listening ability.C. They both do good to children's thinking ability.D. They both focus on interaction between children.2. Which of the following combines exercise and music?A. Reading out loud.B. Playing board games.C. Doing jigsaw puzzles.D. Having a dance party.3. What is the purpose of the text?A. To list four interesting children's parties.B. To recommend four children's favorite books.C. To introduce some activities for children inside.D. To show some funny things for children outside.BAbout a month after I joined Facebook, I got a call from Lori Goler, a highly regarded senior director of marketing at eBay. She made it clear this was a business call. “I want to apply to work with you at Facebook,” she said. “Instead of recommending myself, I want to ask you: What is your biggest problem, and how can I solve it?”My jaw hit the floor. I had hired thousands of people over the previous decade and no one had ever said anything remotely like that. People usually focus on finding the right role for themselves, with the implication that their skills will help the company. Lori put Facebook’s needs front and center. It was a killer approach. I responded, “Recruiting is my biggest problem. And, yes, you can solve it.”Lori never dreamed she would work in recruiting, but she jumped in. She even agreed to trade earnings for acquiring new skills in a new field. Lori did a great job running recruiting and within months was promoted to her current job, leading People@Facebook.The most common metaphor for careers is a ladder, but this concept no longer applies to most workers. As of 2010, the average American had eleven jobs from the ages of eighteen to forty-six alone. Lori often quotes Pattie Sellers, who came up with a much better metaphor: “Careers are a jungle gym, not a ladder.”As Lori describes it, there’s only one way to get to the top of a ladder, but there are many ways to get to the top of a jungle gym. The jungle gym model benefits everyone, but especially women who might be starting careers, switching careers, getting blocked by external barriers, or reentering the workforce after taking time off. The ability to create a unique path with occasional dips, detours (弯路), and even dead ends presents great views of many people, not just those at the top. On a ladder, most climbers are stuck staring at the butt of the person above.4. Why did Lori make the call?A. She helped Facebook to solve the biggest problem.B. She wanted to make a business deal with Facebook.C. She tried to ask for a pay rise in Facebook.D. She wanted to become an employee in Facebook.5. What impressed “I” by Lori?A. Lori was good at running recruiting.B. Lori attached great importance to Facebook’s needs.C. Lori jumped in Facebook with no adequate experience.D. Lori was skilled in marketing at eBay.6. What can we infer from the passage?A. Now all people don’t tend to climb the ladder.B. None on the ladder can enjoy the great views.C. Jungle gyms offer limited exploration for employees.D. A pregnant woman, jobless, benefits little from the jungle gyms.7. What is the best title of the passage?A. It’s a Jungle Gym, Not a Ladder.B. Facebook’s Biggest Problem.C. Applying for a Job in Facebook.D. A Jungle Gym is Better than a Ladder.CAt the foot of the Tianmu Mountain in Zhejiang, a homestay (民宿) is attracting travelers from far and wide, which has won architectural (建筑学的) medal at the 2021 German iF Design Awards.The owners of the homestay are a couple in their late 30s who decided to return to their hometown three years ago. Li Xiumei used to be in charge of a division at a company in Hangzhou, and her husband was a sales director. It was an ordinary situation where Li’s husband was on business trips a lot and Li worked overtime on weekends. City life sometimes is not easy.In 2018, they quit jobs and went back to Dongtianmu village, which lies in a forest of bamboo. The first time they drove into the village was one late afternoon. The cooking smoke was rising from the foot of the mountain, which gave them a very different feeling form thecity.The homestay was built beside her husband’s old countryside house. The old house is preserved (保留), while a brand-new building was built on its side and the whole site is made up of for courtyards. It has been updated tohave a hall, a tea room, a kitchen, a dining room. Japanese cherry trees are planted in the east courtyard. A swimming pool is placed in the west courtyard, with a bar located on one side.Li and her husband love gardening and music, and their new home gives them enough space to continue their interests and relax in the heart of nature. Li wants to share the quiet country life, so she makes her new home a homestay. In 2019, the homestay became an online hit after guests shared their experiences on social media. “The longer I stay here, the more I feel it was the right choice to come back, and this is more meaningful than making money,” Li says.8. How did Li feel about city life?A. Satisfied.B. Tired.C. Attractive.D. Noisy.9. What impressed the couple when first driving to the village?A. The smoke of cooking.B. The forest of bamboo.C. The smell of the village.D. The feeling of loneliness.10. What can we infer about the homestay from paragraph 4?A. It is ancient and broken.B. It can hold many guests.C. It has been rebuilt bythe couple.D. It must have been carefully designed.11. What’s more meaningful than earning money according to Li?A. Continuing their music dream.B. Staying at the old house.C. Living in the countryside.D. Developing the economy of cities.DMy mother is a teacher. I often asked her, “ Why do you teach? What keeps you teaching?” The answer was always the same. “There is always that one child, that one moment that is worth it.”Now, I am a teacher, too. But different from my mother, I teach students challenging activities outdoors. And when my mother asked me the similar questions, my answer was, “It’s that one child, that one special moment.”One of those moments happened recently. I was working with a group of girls in a four-week programme. Everything went on well through the “Team” events and we were moving on to a“High” one called the Wire Walk.In the Wire Walk, each girl had to climb up the pegs in a tree to a wire, 8 meters high, and then walk across it. Of course, everything was safe for sure.When it was Susie's turn, it seemed that she didn't really want to. I asked Susie if she was ready. She answered softly, “I suppose.”Now, Susie was at the foot of the tree. She started to make the long reach. Then I found Susie was becomingnervous with every step. I realized she would not go much further.Susie was halfway up. Then she stopped and held the tree tight, looking very afraid. Her eyes were closed. With her face against the tree, she cried, “I can't.”The other girls sat in silence. I talked quietly to Susie, trying to relax her. I talked for a long time till I ran out of words.“I will still be your friend no matter what, Susie!” Mary broke the silence.To my surprise, Susie lifted her head and looked up to the wire. Then she turned to look down at Mary and smiled. Mary smiled back.Finally, Susie made it all the way across that wire. When she returned to the ground, the first hug she looked for was from Mary. We all cheered. Moments like this keep me doing what I do.12. Why did Susie stop halfway up to the wire?A. It was too high for her to reach.B. She was too afraid to move on.C. Something was wrong with it.D. The teacher asked her to do it.13. Why did Mary break the silence?A. To try again herself.B. To relax the writer.C. To encourage Susie.D. To draw Susie's attention.14. What can we learn from the story of Susie?A. Helping others is helping ourselves.B. A word of encouragement matters a lot.C. Outdoor activities bring peoplecloser than ever.D. A good method plays an important role in teaching.15. Which of the following can be the best title for the passage?A. The Wire WalkB. That One MomentC. Fear and CourageD. The Young Hearts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。
辽宁省大连市旅顺口区2020届高三化学上学期期中试题(含解析)
【答案】C
【解析】
【详解】A。同一主族从上到下，气态氢化物的稳定性依次减弱,则稳定性HBr>HI，能用元素周期律解释,A项不选；
B。同一主族从上到下，金属性逐渐增强，氢氧化物的碱性逐渐增强，碱性NaOH>LiOH，则同浓度的两种溶液，NaOH溶液的pH较大，能用元素周期律解释,B项不选；
C、白磷转化为红磷是化学变化，选项C错误；
D、Mn2O7是酸性氧化物，也是金属氧化物，选项D正确。
答案选D。
5。在室温下，下列各组离子一定能大量共存的是（ ）
A. 滴入石蕊试液显红色的溶液：K+、Mg2+、AlO2−、SO32−
B。 1。0mol·L−1的KNO3溶液：H+、Fe2+、Cl−、SO42−
C.Na2SO3与盐酸反应生成SO2，能够证明酸性：HCl>H2SO3，但不能体现元素周期律,C项选；
D。同周期从左到右,金属性逐渐减弱,金属单质的还原性逐渐减弱,因此Mg比Al与等浓度的盐酸反应更剧烈,能用元素周期律解释，D项不选。
答案选C。
7。下列离子方程式正确的是( ）
A. 等体积、等浓度的Ba（OH)2稀溶液与NH4HCO3稀溶液混合：Ba2++2OH−+NH4++HCO3−=BaCO3↓+NH3·H2O+H2O
答案选C。
3。用NA表示阿伏加德罗常数的值，下列叙述正确的是（ ）
A. 标准状况下,33.6LHF中含有氟原子的数目为1。5NA
B. 16gO3和O2混合物中氧原子数为NA
C. 1mol的羟基与1mol的氢氧根离子所含的电子数均为9NA
大连市旅顺口区2020届高三上学期期中考试英语试卷 Word版含答案
高三英语第一部分阅读理解（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，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上将该项涂黑。
AI believe in the power of holding on. What do I mean by holding on? Hugging, or holding on, is the power we possess when we put our arms around someone. It can change relationships, makes a patient a person, an acquaintance a friend.My grandmother taught me about holding on, whenever she gathered me in her strong, loving Irish arms. She always hugged even when her back became curved .My mother hugs my children the same way—heart open and arms wide, breathing them into her soul.Once I became aware of its power, I started experimenting: I held my mother-in-law a moment too long then moved onto my sisters-in-law, aunts, nieces, nephews, and cousins. I tried it with a friend who had made my life rich with laughter, but I was too embarrassed to tell her, and acquaintances that I wanted to be friends with. Some were bothered, others accepting, but all had one thing in common—the next time I hugged them, they hugged me back.For me, holding on has become more than a physical interaction; it has become a way of thinking. My answer to life’s dilemmas and tough choices, it’s a mixture of acceptance, forgiveness, and patience—not always easy or understood but it guides me to be quiet and listen, look for the good, have a sense of humor and laugh, stop worrying and be patient because if I let it, something will change.I’ve often wondered how different my life would have been if I hadn’t learned the p ower of holding on. If during that time in my life, when I was crumbling into myself, my mother had stopped holding on to me, I might have missed something so vital to my existence. I believe that a hug is likea battery charger—a good one can keep me going for a long time.1. It can be learned from the passage that________.A. holding your friends’ hands is beneficialB. hugging a stranger is a very common thingC. the power of holding on is beyond expectationD. a good habit came down from Grandparents2. When her grandmother hugged the author_______.A. she knew her grandmother were from IrelandB. she found her grandmother older and olderC. she could sense her grandmother wasn’t herselfD. she could feel great love from her loved one3 When the author offered to make friends with others______A. she was misunderstood in a wayB. she was refused immediatelyC. she was thought to be foolishD. she was made fun of at once4. What is author’s attitude towards her life ?A .Compromising B. Optimistic C. Pessimistic D. UnbelievableBThe Boy Made It!One Sunday, Nicholas, a teenager, went skiing at Sugarloaf Mountain in Maine. In the early afternoon, when he was planning to go home, a fierce snowstorm swept into the area. Unable to see far, he accidentally turned off the path. Before he knew it, Nicholas was lost, all alone! He didn’t have food, water, a phone, or other supplies. He was getting colder by the minute.Nicholas had no idea where he was. He tried not to panic. He thought about all the survival shows he had watched on TV. It was time to put the tips he had learned to use.He decided to stop skiing. There was a better chance of someone finding him if he stayed put. The first thing he did was to find shelter from the freezing wind and snow. If he didn’t, his body temperature would get very low, which could quickly kill him. Using his skis, Nicholas built a snow cave. He gathered a huge mass of snow and dug out a hole in the middle. Then he piled branches on top of himself, like a blanket, to stay as warm as he could.By that evening, Nicholas was really hungry. He ate snow and drank water from a nearby stream so that his body wouldn’t lose too much water. Not knowing how much longer he could last, Nicholas did the only thing he could — he huddled (蜷缩) in his cave and slept.The next day, Nicholas went out to look for help, but he couldn’t find anyone. He followed his tracks and returned to the snow cave, because without shelter, he could die that night. On Tuesday, Nicholas went out again to find help. He had walked for about a mile when a volunteer searcher found him. After two days stuck in the snow, Nicholaswas saved.Nicholas might not have survived this snowstorm had it not been for TV. He had often watched Grylls’survival show Man vs. Wild. That’s where he learned the tips that saved his life. In each episode(一期节目) of Man vs. Wild, Grylls is abandoned in a wild area andhas to find his way out.When Grylls heard about Nicholas’ amazing deeds, he was super impressed that Nicholas had made it since he knew better than anyone how hard Nicholas had to work to stay alive.5. What happened to Nicholas one Sunday afternoon?A. He broke his skis.B. He got lost.C. He hurt his eyesD. He caught a cold.6. How did Nicholas keep himself warm?A. He found a shelter.B. He lighted some branches.C. He built a snow cave.D. He kept on skiing.7. On Tuesday, Nicholas ______.A. returned to his shelter safelyB. got stuck in the snowC. was saved by a searcherD. stayed where he was8. Nicholas left Grylls a very deep impression because he ______.A. was very hard-workingB. watched Grylls’ TV program regularlyC. created some tips for survivalD. did the right things in the dangerous situationCJack Ma’s net worth increased $2.8bn overnight as Alibaba forecast sales growth that topped every analyst’s estimate, despite the fact that China’s economy is slowing down.Mr. Ma, aged 52 this year, is now the richest person in Asia and 14th wealthiest in the world, according to the Bloomberg Billionaires Index. His net worth has climbed $8.5bn this year to $41.8bn.The latest surge came after China’s largest e-commerce company forecast 45 to 49 percent revenue(收入) growth in the year ending March, demonstrating how investments beyond online shopping are paying off. Shares in Alibaba, where Mr. Ma is chairman, rose 13 percent to a record high.Alibaba and Tencent, which dominate online shopping and social media, respectively have ventured(冒险) deeper into new areas from cloud computing services to streaming music and video as the country’s economy slows. Alibaba is capturing more digital advertising spending by incorporating(合并) social elements such as video in its shopping sites.Alibaba is holding meetings with investors this week. On Friday, the former English teacher said he wasn’t going to discuss corporate forecasts. He took the stage instead to describe how his company had become effectively the world’s 22nd largest economy—just after Argentina—in terms of transaction(交易) by never fearing to think big. Mr. Ma, who said Alibaba revises 10-year plans annually, foresaw the company becoming the fifth-largest eventually by 2036 by serving a burgeoning Chinese middle classes, taking advantage of global trade and making use of its valuable data.Ma’s comments about the evolution of data-driven technology echoed Masayoshi Son, Chairman of Japan’s SoftBank. SoftBank—Alibaba’s largest shareholder—has invested billions in companies such as ARM with the intention of staking out a leading position in the future Internet of Things.“The Internet of Things is going to be big because in the past, machines drink electricity,” Mr. Ma told investors. “In the next 20 years, machi nes will drink data. In the future, no company, nocountry, no business can survive without data.”9. What can we infer from the passage?A. Jack Ma has become the richest person in the world.B. China’s economy is not satisfying.C. online shopping grows rapidly worldwide.D. Alibaba is the largest company in the world.10. The underlined word “surge” in Paragraph 3 probably means_____.A. uncertaintyB. rapid declineC. dead timeD. sudden increase11. What do we know about Alibaba?A. It has been providing cloud computing services.B. It makes profits mainly from digital advertising.C. It is China’s largest social media company.D. It aims to research into streaming music and video.12. What does Jack Ma stress in the last paragraph?A. The importance of the data.B. The investment of global tradeC. The necessity sharing information.D. The future of the Internet of Things.D.Most nations have at least one type of food that people from other countries think is unusual or unethical（不道德的）to eat. In France, people eat horse meat and frog legs. In South Korea and parts of China, restaurants serve dog meat. And in Australia, it’s common to cook kangaroo meat on the barbecue and use emu（鸸鹋）eggs to make pancakes.The kangaroo and emu are native to Australia. Both animals are important to the national image of Australia and appear on the Australian coat of arms. They’re also central figures in the history of the indigenous（土生土长的）Australian Aboriginals（土著人）. However, Aboriginal tribes still hunt these animals for their meat, fur and fat.Today, Australian people continue to eat these animals. One of the reasons people eat kangaroo meat is that it’s high in protein and low in fat, so eating kangaroo is a good opti on for anyone on a diet. It’s also cheaper to eat kangaroo meat than other red meats. Because of this, a lot of university students choose to buy kangaroo meat. BBC News also reported that Australian scientists believe that eating kangaroo meat is good for the environment--kangaroos have different digestive systems than cows and sheep, meaning they produce less methane（甲烷），the second biggest contributor to global warming.While emu meat is high in iron and vitamin C, most people don’t think it tastes go od. For this reason, they prefer emu eggs. One egg is large enough to make seven omelettes（煎蛋）. And while it’s illegal to collect emu eggs from the wild, they can be bought from emu farms. Rather than cracking the beautiful dark shell, it’s better to drain it by putting a small hole at each end and blowing. Afterwards, you can even carve a design into the eggshell.13. The author mentioned the meat-eating customs of different countries at the beginning of the article to __________.A. present different cult ures’ meat-eating preferencesB. introduce the consumption of kangaroo meat and emu eggs in AustraliaC. suggest that people try to understand other countries’ dietsD. compare different eating habits among different countries14. According to the article, the kangaroo __________.A. is not considered precious in AustraliaB. contains large amounts of iron and vitamins in its meatC. faces extinction due to hunting by Aboriginal tribesD. is considered healthy and environmentally friendly to eat15. Which of the following statements is TRUE about emu eggs?A. Emu eggs taste terrible but are nutritious.B. The shells of emu eggs are not difficult to break.C. Emu egg shells can be used to create art.D. It’s common for Australians to collect emu eggs from the wild.第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
2020届辽宁省大连市旅顺口区高三上学期期中考试生物试卷及答案
绝密★启用前辽宁省大连市旅顺口区2020届高三年级上学期期中质量检测生物试题一、单项选择题（本大题共50小题，每小题1分，共50分。
在每小题给出的四个选项中，只有一项符合题目要求。
）1、假如你发现了一种新的单细胞生物并决定对其分类，以下哪种特性与你的决定无关（）A．核膜的有无 B．核糖体的有无C．细胞壁的有无 D．光合色素的有无2、真核细胞中,下列代谢过程在生物膜上进行的是（）A．有氧呼吸中[H]和氧的结合B．转录时mRNA的合成C．翻译时氨基酸的脱水缩合 D．光合作用中ATP的水解3、如图为某植物幼苗受单侧光照射一段时间后切片示意图,其中圆点表示生长素,下列相关叙述错误的是（）A．此部位的生长素来自幼苗尖端B．b侧生长素浓度高,故单侧光来自b侧C．a侧细胞的伸长速度小于b侧D．a侧的生长素效应相当于茎横放的远地侧4、下列关于蛋白质和核酸的叙述,正确的是（）A.高温会破坏蛋白质的肽键而使其变性B.生物体中的酶都是由氨基酸脱水缩合形成的多聚体C.基因中碱基的排列顺序决定蛋白质中氨基酸的排列顺序D.真核细胞的遗传信息均储存于细胞核中的染色体上5、当前,有少数学生沉迷于用手机玩游戏、聊天等,使学习成绩下降,研究表明过度使用手机,其辐射会对人的脑部神经造成一定伤害,从而使理解力、记忆力下降,在下列脑的结构中,与学习和记忆有关的主要是（）A.小脑B.大脑皮层C.下丘脑D.脑干6、下列有关生物学实验的叙述,正确的是（）A．用苏丹Ⅳ染液可检测生物组织中维生素D的存在B．观察DNA和RNA在细胞中分布时,应选择染色均匀,细胞质色泽较深的区域C．分离叶绿体中的色素时,不同色素随无水乙醇在滤纸上的扩散速度不同D．健那绿可以使活细胞中的线粒体染成蓝绿色,利于在高倍镜下观察生活状态的线粒体的分布及形态7、2016年诺贝尔生理学奖授予日本科学家大隅良典,以鼓励他在“细胞自噬机制方面的发现”。
细胞自噬,即细胞可以通过相关的细胞器以清除自身内部的某些变性的大分子,或分解衰老、损伤的细胞器和细胞。
2020届大连市旅顺口区高三物理上学期期中卷附答案详析
2020届大连市旅顺口区高三物理上学期期中卷（时间：90分钟 总分：110分 Ⅰ卷涂答题卡，Ⅱ卷写答题卡）第Ⅰ卷（选择题：每题4分，共48分）一、选择题（其中1---8题为单选，9---12题为多选，多选，错选不得分，选不全的得2分）1．甲、乙两车在同一水平道路上，一前一后相距s=6m ，乙车在前，甲车在后，某时刻两车同时开始运动，两车运动的过程如图所示，则下列表述正确的是( )A ．当t =4s 时两车相遇B ．当t =4s 时两车间的距离最大C ．两车有三次相遇D ．两车有两次相遇2. 一人站在斜坡上，推着一个重力大小为G 的大雪球，若雪球刚好处在一处倾角为θ的光滑斜面上，且始终处于静止状态，此人的推力通过雪球的球心，则（ ） A ．此人的推力最小值为Gtan θ B ．此人的推力最小值为Gsin θ C ．此人的推力最大值为G/cos θ D ．此人的推力最大值为Gcot θ3．如图，质量为1.5kg 的物体A 静止在竖直的轻弹簧上，质量为0.5kg 的物体B 由细线悬挂在天花板上，B与A 刚好接触但不挤压。
现突然将细线剪断，则剪断后瞬间A 、B 间的作用力大小为(g 取10m/s 2)( ) A ．0B ．2.5NC ．3.75ND ．5N4．地球赤道上有一物体随地球的自转，所受的向心力为F 1，向心加速度为a 1，线速度为v 1，角速度为ω1；绕地球表面附近做圆周运动的人造卫星（高度忽略），所受的向心力为F 2，向心加速度为a 2，线速度为v 2，角速度为ω2；地球的同步卫星所受的向心力为F 3，向心加速度为a 3，线速度为v 3，角速度为ω3；地球表面的重力加速度为g ，第一宇宙速度为v ，假设三者质量相等，则（ ）A ．123F F F =>B ．123a a g a ==>C ．123v v v v ==>D ．132ωωω=<5．列车在空载情况下以恒定功率P 经过一段平直的路段，通过某点时速率为v ，加速度为a 1；当列车满载货物再次经过同一点时，功率和速率均与原来相同，但加速度变为a 2。
2020届大连市旅顺口区高三理科数学上学期期中卷附答案详析
2020届大连市旅顺口区高三理科数学上学期期中卷第Ⅰ卷（12题：共60分）一、选择题（包括12小题，每小题5分，共60分） 1.已知全集UR =,集合{}21A x y x ==-，集合{}2x B y y ==，则U A C B I 为 （ ）A ．[1,0]-B ．[1,0)-C ．(0,1]D ．[0,1]2.若复数z 满足(12)5i z +=,i 为虚数单位,则z 的虚部为 （ ） A.2i - B.2- C.2 D.2i3.已知等差数列{}n a 的前n 项和为n S ，若6789a a a ++=，是13S 的值为 （ ）A.117B.28C.39D.56 4.11()x e x dx -+⎰的值为 （ ）A ．1e e -B ．1e e +C ．12e +D ．12e - 5.中国古代数学著作《算法统宗》中有这样一个问题：“三百七十八里关，初行健步不为难，次日脚痛减一半，六朝才得其关，要见次日行里数，请公仔细算相还。
”其意思是“有一个人走378里，第一天健步行走，从第二天起脚痛每天走的路程是前一天的一半，走了6天后到达目的地。
”请问第一天走了 （ ）A.192里B.68里C.48里D.220里 6.若将函数2sin3y x =的图像向左平移12π个单位长度，则平移后图象的对称轴为 （ ） A.2()12x k k Z ππ=+∈ B.()123k x k Z ππ=+∈ C.52()36x k k Z ππ=+∈ D.()363k x k Z ππ=+∈ 7. 有下列结论：（1）命题2:,0p x R x ∀∈>总成立，则命题2:,0p x R x ⌝∀∈≤总成立。
（2）设2:0,:20,2xp q x x x >+->+则p 是q 的充分不必要条件。
（3）命题：若0ab =，则0a =或0b =，其否命题是真命题。
（4）非零向量a r 和b r 满足||||||a b a b ==-r r r r ，则a r 与a b +r r的夹角为30︒。
2020年大连市旅顺实验中学高三英语上学期期中试题及参考答案
2020年大连市旅顺实验中学高三英语上学期期中试题及参考答案第一部分阅读（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ABrooklyn Children's MuseumFounded in 1899 as the country's first museum specifically made for children, today BCM is comprehensive, with a permanent collection of 30,000 objects, including musical instruments, masks and dolls. Kids love the interactive World Brooklyn, a small cityscape（城市风光）lined by stores where children can pretend to be working grown-ups.Children's Museum of ManhattanLooking for interactive art that welcomes curious minds? Then head to Inside Art, the current show up at CMOM, which lets your little ones climb in and over and all around the exhibits. It's ideas like this that make the 40,000-square-foot so special. Learning about culture, history and science is a pride for kids aged six and under. CMOM also hosts classes—like Gross Biology for kids who are interested in insects-all designed with the latest child-development research in mind.DiMenna Children's History MuseumThe hands-on displays at this kid-focused arm of the New York Historical Society transport children back through 350 years of US history, with a special focus on NYC. Children are encouraged to climb around and interact with exhibits that highlight the lives of kids who grew up to become famous doctors, athletes and political figures! Little New Yorkers can get in on sing-alongs and crafts. Other family programs include cookings classes, games and story hours.Staten Island Children's MuseumStaten Island Children's Museum nurtures（培养）creativity. It offers hands-on experiences like the Block Harbor（plenty of blocks to play with!）, larger-than-life games like Connect Four and Dominoes, and even the opportunity to climb through a human-sized anthill or play firefighter at Ladder 11, so you'll find immersive（沉浸式的）fun around every corner. Don't forget to stop by Green Living Room powered by the wind energy where the kids can learn about ways to reduce our carbon footprint.1. Which museum provides biology classes for kids?A. Brooklyn Children's Museum.B. Staten Island Children's Museum.C. Children's Museum of Manhattan.D. DiMenna Children's History Museum.2. What can kids do in DiMenna Children's History Museum?A. Play interesting games with great firefighters.B. Know about famous people's childhood lives.C. Run stores like adults in different small streets.D. Cook delicious local food with foreign athletes.3. Where can kids learn how to protect the environment?A. At Ladder 11.B. At the Block Harbor.C In Green Living Room. D. On a human-sized anthill.BI don’t think I can recall a time whenI wasn’t aware of the beauty of the ocean. Growing up inAustralia, I had the good fortune of having the sea at my side. The first time I went toHalfmoonBay,I suddenly had the feeling of not being able to feel the ground with my feet anymore.For my 10th birthday, my sister and I were taken out to theGreat Barrier Reef. There were fish in different color1 s, caves and layers of coral. They made such an impression on me. When I learned that only one percent ofAustralia’sCoral Seawas protected, I was shocked. Australian marine (海洋的) life is particularly important because the reefs have more marine species than any other country on earth. But sadly, only 45% of the world’s reefs are considered healthy.This statistic is depressing, so it’s important for usto do everything to protect them. The hope that theCoral Searemains a complete ecosystem has led me to take action. I’ve become involved with the Protect Our Coral Sea activity, which aims to create the largest marine park in the world. It would serve as a place where the ocean’s species will all have a safe place forever.Together, Angus and I created a little video and we hope it will inspire people to be part of the movement. Angus also shares many beautiful childhood memories of the ocean as a young boy, who grew up sailing, admiring the beauty of the ocean, and trying to find the secrets of ocean species.4. What can we learn about the author from the underlined sentence inPara. 1?A. He seldom went surfing at the sea.B. He forgot his experiences about the ocean.C. He never went back to his hometown.D. He had a wonderful impression ofHalfmoonBay.5. What is Australian marine life like according to the second paragraph?A. It is escaping from theCoral Seagradually.B. It depends on reefs for living greatly.C. It may be faced with danger.D. It is protected better than that in other oceans.6. What’s the purpose of The Protect Our Coral Sea activity?A. It is intended to contribute to a complete ecosystem.B. It is intended to prevent more marine species being endangered.C. It is intended to set up a large nature reserve for reefs.D. It is intended to raise more teenagers’ environmental awareness.7. Why do Angus and the author create a little video?A. To urge more people to take action toprotect the marine species.B. To inspire more people to explore the secret of the ocean.C. To share their childhood experiences about the ocean.D. To bring back to people their memory of ocean species.CPoaching and habitat loss have threatened Africa's two species of elephants, taking them closer toward the edge of disappearance, according to a new report released by the International Union for Conservation of Nature(IUCN).Before this update, Africa's elephants were grouped together and were evaluated as vulnerable by the IUCN. This is the first time the two species have been sorted separately. In the past, elephants were mostly considered as either Asian elephants or African elephants. Forest and savanna elephants were typically classified as subspecies of African elephants.The African forest elephant is now listed as critically endangered and the African savanna elephant as endangered. The number of African forest elephants fell by more than 86% over a 31 -year assessment period. The population of African savanna elephants dropped by at least 60% over the last 50 years, according to the IUCN, which tracks the assessment risk of the world's animals. Africa currently has an estimated 415,000 elephants, counting the two species together.Both elephant species experienced significant population decreases because of poaching. Although it peaked in 2011, illegal hunting still happens and continues to threaten elephant populations. African elephants also face continued habitat loss as their land isconvertedfor agriculture or other uses.There is some good conservation news, the IUCN points out. Anti-poaching measures, combined with betterland use planning to support better human-wildlife relationships, have helped conservation efforts. Some forest elephant population figures have stabilized in well-managed areas in Gabon and the Republic of Congo and savanna population figures have remained stable or have been growing, particularly in the Kavango-Zambezi Transfrontier Conservation Area in southern Africa.But with constant demand for ivory and increasing human pressures on Africa's wild lands, concern for Africa's elephants is high, and the need to creatively conserve and wisely manage these animals and their habitats is more severe than ever.8. What can be inferred from the new report about African elephants?A. They are divided into three kinds.B. They are dying out.C. Their threat is mainly from poaching.D. Their population has grown in Africa.9. What does the author mainly tell us in Paragraph 3?A. The detailed number of African elephants.B. The similarities of African elephants.C. The different types of African elephants.D. The present situation of African elephants.10. What does the underlined word "converted" in Paragraph 4 probably mean?A. Expanded.B. Protected.C. Transformed.D. Forbidden.11. What's the authors attitude to the present situation of African elephants?A. Hopeless.B. Optimistic.C. Uncertain.D. Worried.DIs renting clothes greener than buying them? Sustainable (可持续的) fashion expert Elizabeth Cline isn’t sure. Clothing renting is a hot new industry and businessmen are trying to attract shoppers who care about the environment. Last summer alone,Urban Outfitters, Macy’s, Bloomingdale’s American EagleandBanana Republicall announced renting services – a sure sign of changing times.But is renting fashion actually more environmentally-friendly than buying it? And if so, how much more? Journalist and author Elizabeth Cline researched this question in a feature article for Elle, and she concluded that it’s not as sustainable as it seems.Take shipping for example, which has to go two ways if an item is rented – receiving and returning. Cline writes that consumer transportation has the second largest carbon footprint of our collective fashion habit after manufacturing.Then there’s the burden of washing, which has to happen for every item when it’s returned, regardless of whether or not it was worn. For most renting services, this usually means dry-cleaning, which is a pollutingprocess. All the renting services that Cline looked into have replaced perchloroethylene, a carcinogenic (致癌的) air pollutants that’s still used by 70 percent of US dry cleaners, with hydrocarbon (碳氢化合物) alternatives, although these aren’t great either. They can produce harmful waste and air pollution if not handled correctly.Lastly, Cline fears that renting services will increase our appetite for fast fashion, simply because it’s so easily accessible. There’s something called “share-washing” that makes people have more wasteful behaviors because a product or service is shared and thus is considered more eco-friendly. Uber is one example of this: advertised as a way to share rides and reduce car ownership, and yet it has been proven to discourage walking, bicycling and public transportation use.Renting clothes is still preferable to buying them cheap and throwing them into the bin after wearing them a few times, but we shouldn’t let the availability of these services make us self-satisfied. There’s an even better step – and that’s wearing what we already have.12. What do we know about Elizabeth Cline from the passage?A. She is trying to attract shoppers.B. She is an expert and journalist.C. She has created “share-washing”.D. She never rents clothes.13. Why does renting services increase people’s appetite for fast fashion?A. Because it is handled correctly.B. Because it is transported easily.C. Because it is fairly eco-friendly.D. Because it is easily accessible.14. What can we infer from the passage?A. Clothing renting became popular ten years ago.B. Consumer transportation has the largest carbon footprint.C. Renting clothes deserves further consideration.D. Uber is a good example of sharing rides.15. Which section of a newspaper does the text probably come from?A. Environment.B. Technology.C. Travel.D. Medicine.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。